Provided by: lf_30-1ubuntu0.1_amd64 bug

NAME

       lf - terminal file manager

SYNOPSIS

       lf [-command command] [-config path] [-cpuprofile path] [-doc] [-last-dir-path path]
          [-log path] [-memprofile path] [-remote command] [-selection-path path] [-server]
          [-single] [-version] [-help] [cd-or-select-path]

DESCRIPTION

       lf is a terminal file manager.

       Source code can be found in the repository at https://github.com/gokcehan/lf

       This  documentation  can  either  be  read  from  terminal  using  'lf  -doc' or online at
       https://pkg.go.dev/github.com/gokcehan/lf You can also use 'doc' command (default '<f-1>')
       inside  lf  to view the documentation in a pager. A man page with the same content is also
       available in the repository at https://github.com/gokcehan/lf/blob/master/lf.1

       You can run 'lf -help' to see descriptions of command line options.

QUICK REFERENCE

       The following commands are provided by lf:

           quit                     (default 'q')
           up                       (default 'k' and '<up>')
           half-up                  (default '<c-u>')
           page-up                  (default '<c-b>' and '<pgup>')
           scroll-up                (default '<c-y>')
           down                     (default 'j' and '<down>')
           half-down                (default '<c-d>')
           page-down                (default '<c-f>' and '<pgdn>')
           scroll-down              (default '<c-e>')
           updir                    (default 'h' and '<left>')
           open                     (default 'l' and '<right>')
           jump-next                (default ']')
           jump-prev                (default '[')
           top                      (default 'gg' and '<home>')
           bottom                   (default 'G' and '<end>')
           high                     (default 'H')
           middle                   (default 'M')
           low                      (default 'L')
           toggle
           invert                   (default 'v')
           invert-below
           unselect                 (default 'u')
           glob-select
           glob-unselect
           calcdirsize
           copy                     (default 'y')
           cut                      (default 'd')
           paste                    (default 'p')
           clear                    (default 'c')
           sync
           draw
           redraw                   (default '<c-l>')
           load
           reload                   (default '<c-r>')
           echo
           echomsg
           echoerr
           cd
           select
           delete         (modal)
           rename         (modal)   (default 'r')
           source
           push
           read           (modal)   (default ':')
           shell          (modal)   (default '$')
           shell-pipe     (modal)   (default '%')
           shell-wait     (modal)   (default '!')
           shell-async    (modal)   (default '&')
           find           (modal)   (default 'f')
           find-back      (modal)   (default 'F')
           find-next                (default ';')
           find-prev                (default ',')
           search         (modal)   (default '/')
           search-back    (modal)   (default '?')
           search-next              (default 'n')
           search-prev              (default 'N')
           filter         (modal)
           setfilter
           mark-save      (modal)   (default 'm')
           mark-load      (modal)   (default "'")
           mark-remove    (modal)   (default '"')
           tag
           tag-toggle               (default 't')
           maps
           cmaps
           jumps

       The following command line commands are provided by lf:

           cmd-escape               (default '<esc>')
           cmd-complete             (default '<tab>')
           cmd-menu-complete
           cmd-menu-complete-back
           cmd-menu-accept
           cmd-enter                (default '<c-j>' and '<enter>')
           cmd-interrupt            (default '<c-c>')
           cmd-history-next         (default '<c-n>' and '<down>')
           cmd-history-prev         (default '<c-p>' and '<up>')
           cmd-left                 (default '<c-b>' and '<left>')
           cmd-right                (default '<c-f>' and '<right>')
           cmd-home                 (default '<c-a>' and '<home>')
           cmd-end                  (default '<c-e>' and '<end>')
           cmd-delete               (default '<c-d>' and '<delete>')
           cmd-delete-back          (default '<backspace>' and '<backspace2>')
           cmd-delete-home          (default '<c-u>')
           cmd-delete-end           (default '<c-k>')
           cmd-delete-unix-word     (default '<c-w>')
           cmd-yank                 (default '<c-y>')
           cmd-transpose            (default '<c-t>')
           cmd-transpose-word       (default '<a-t>')
           cmd-word                 (default '<a-f>')
           cmd-word-back            (default '<a-b>')
           cmd-delete-word          (default '<a-d>')
           cmd-capitalize-word      (default '<a-c>')
           cmd-uppercase-word       (default '<a-u>')
           cmd-lowercase-word       (default '<a-l>')

       The following options can be used to customize the behavior of lf:

           anchorfind       bool      (default true)
           autoquit         bool      (default false)
           cleaner          string    (default '')
           cursoractivefmt  string    (default "\033[7m")
           cursorparentfmt  string    (default "\033[7m")
           cursorpreviewfmt string    (default "\033[4m")
           dircache         bool      (default true)
           dircounts        bool      (default false)
           dirfirst         bool      (default true)
           dironly          bool      (default false)
           dirpreviews      bool      (default false)
           drawbox          bool      (default false)
           errorfmt         string    (default "\033[7;31;47m")
           filesep          string    (default "\n")
           findlen          int       (default 1)
           globsearch       bool      (default false)
           hidden           bool      (default false)
           hiddenfiles      []string  (default '.*')
           history          bool      (default true)
           icons            bool      (default false)
           ifs              string    (default '')
           ignorecase       bool      (default true)
           ignoredia        bool      (default true)
           incfilter        bool      (default false)
           incsearch        bool      (default false)
           info             []string  (default '')
           infotimefmtnew   string    (default 'Jan _2 15:04')
           infotimefmtold   string    (default 'Jan _2  2006')
           mouse            bool      (default false)
           number           bool      (default false)
           numberfmt        string    (default "\033[33m")
           period           int       (default 0)
           preview          bool      (default true)
           previewer        string    (default '')
           promptfmt        string    (default "\033[32;1m%u@%h\033[0m:\033[34;1m%d\033[0m\033[1m%f\033[0m")
           ratios           []int     (default '1:2:3')
           relativenumber   bool      (default false)
           reverse          bool      (default false)
           ruler            []string  (default 'acc:progress:selection:filter:ind')
           scrolloff        int       (default 0)
           selmode          string    (default 'all')
           shell            string    (default 'sh' for Unix and 'cmd' for Windows)
           shellflag        string    (default '-c' for Unix and '/c' for Windows)
           shellopts        []string  (default '')
           smartcase        bool      (default true)
           smartdia         bool      (default false)
           sortby           string    (default 'natural')
           tabstop          int       (default 8)
           tagfmt           string    (default "\033[31m")
           tempmarks        string    (default '')
           timefmt          string    (default 'Mon Jan _2 15:04:05 2006')
           truncatechar     string    (default '~')
           waitmsg          string    (default 'Press any key to continue')
           wrapscan         bool      (default true)
           wrapscroll       bool      (default false)
           user_{option}    string    (default none)

       The following environment variables are exported for shell commands:

           f
           fs
           fx
           id
           PWD
           OLDPWD
           LF_LEVEL
           OPENER
           VISUAL
           EDITOR
           PAGER
           SHELL
           lf
           lf_{option}
           lf_user_{option}
           lf_width
           lf_height
           lf_count

       The following special shell commands are  used  to  customize  the  behavior  of  lf  when
       defined:

           open
           paste
           rename
           delete
           pre-cd
           on-cd
           on-select
           on-quit

       The following commands/keybindings are provided by default:

           Unix                     Windows
           cmd open &$OPENER "$f"   cmd open &%OPENER% %f%
           map e $$EDITOR "$f"      map e $%EDITOR% %f%
           map i $$PAGER "$f"       map i !%PAGER% %f%
           map w $$SHELL            map w $%SHELL%

       The following additional keybindings are provided by default:

           map zh set hidden!
           map zr set reverse!
           map zn set info
           map zs set info size
           map zt set info time
           map za set info size:time
           map sn :set sortby natural; set info
           map ss :set sortby size; set info size
           map st :set sortby time; set info time
           map sa :set sortby atime; set info atime
           map sc :set sortby ctime; set info ctime
           map se :set sortby ext; set info
           map gh cd ~
           map <space> :toggle; down

       If the 'mouse' option is enabled, mouse buttons have the following default effects:

           Left mouse button
               Click on a file or directory to select it.

           Right mouse button
               Enter a directory or open a file. Also works on the preview window.

           Scroll wheel
               Move up or down. If Ctrl is pressed, scroll up or down.

CONFIGURATION

       Configuration files should be located at:

           OS       system-wide               user-specific
           Unix     /etc/lf/lfrc              ~/.config/lf/lfrc
           Windows  C:\ProgramData\lf\lfrc    C:\Users\<user>\AppData\Local\lf\lfrc

       Colors file should be located at:

           OS       system-wide               user-specific
           Unix     /etc/lf/colors            ~/.config/lf/colors
           Windows  C:\ProgramData\lf\colors  C:\Users\<user>\AppData\Local\lf\colors

       Icons file should be located at:

           OS       system-wide               user-specific
           Unix     /etc/lf/icons             ~/.config/lf/icons
           Windows  C:\ProgramData\lf\icons   C:\Users\<user>\AppData\Local\lf\icons

       Selection file should be located at:

           Unix     ~/.local/share/lf/files
           Windows  C:\Users\<user>\AppData\Local\lf\files

       Marks file should be located at:

           Unix     ~/.local/share/lf/marks
           Windows  C:\Users\<user>\AppData\Local\lf\marks

       Tags file should be located at:

           Unix     ~/.local/share/lf/tags
           Windows  C:\Users\<user>\AppData\Local\lf\tags

       History file should be located at:

           Unix     ~/.local/share/lf/history
           Windows  C:\Users\<user>\AppData\Local\lf\history

       You can configure the default values of following variables to change these locations:

           $XDG_CONFIG_HOME  ~/.config
           $XDG_DATA_HOME    ~/.local/share
           %ProgramData%     C:\ProgramData
           %LOCALAPPDATA%    C:\Users\<user>\AppData\Local

       A        sample        configuration        file        can        be       found       at
       https://github.com/gokcehan/lf/blob/master/etc/lfrc.example

COMMANDS

       This section shows information about builtin commands. Modal  commands  do  not  take  any
       arguments,  but instead change the operation mode to read their input conveniently, and so
       they are meant to be assigned to keybindings.

           quit                     (default 'q')

       Quit lf and return to the shell.

           up                       (default 'k' and '<up>')
           half-up                  (default '<c-u>')
           page-up                  (default '<c-b>' and '<pgup>')
           scroll-up                (default '<c-y>')
           down                     (default 'j' and '<down>')
           half-down                (default '<c-d>')
           page-down                (default '<c-f>' and '<pgdn>')
           scroll-down              (default '<c-e>')

       Move/scroll the current file selection upwards/downwards by one/half a page/full page.

           updir                    (default 'h' and '<left>')

       Change the current working directory to the parent directory.

           open                     (default 'l' and '<right>')

       If the current file is a directory, then change the current directory  to  it,  otherwise,
       execute  the  'open'  command.  A  default  'open' command is provided to call the default
       system opener asynchronously with the current  file  as  the  argument.  A  custom  'open'
       command can be defined to override this default.

           jump-next                (default ']')
           jump-prev                (default '[')

       Change the current working directory to the next/previous jumplist item.

           top                      (default 'gg' and '<home>')
           bottom                   (default 'G' and '<end>')

       Move  the  current  file  selection  to  the  top/bottom  of the directory. A count can be
       specified to move to a specific line, for example use `3G` to move to the third line.

           high                     (default 'H')
           middle                   (default 'M')
           low                      (default 'L')

       Move the current file selection to the high/middle/low of the screen.

           toggle

       Toggle the selection of the current file or files given as arguments.

           invert                   (default 'v')

       Reverse the selection of all files in the current directory  (i.e.  'toggle'  all  files).
       Selections  in  other  directories  are not effected by this command. You can define a new
       command to select all files in the directory by combining 'invert' with  'unselect'  (i.e.
       'cmd  select-all  :unselect;  invert'),  though  this will also remove selections in other
       directories.

           invert-below

       Reverse the selection (i.e. 'toggle') of all files at or after the  current  file  in  the
       current directory.

       To  select  a  contiguous  block  of files, use this command on the first file you want to
       select. Then, move down to the first file you do *not* want to select (the one  after  the
       end  of the desired selection) and use this command again. This achieves an effect similar
       to the visual mode in vim.

       This command is experimental and may be removed once a better replacement for  the  visual
       mode  is  implemented  in  'lf'.  If you'd like to experiment with using this command, you
       should bind it to a key (e.g. 'V') for a better experience.

           unselect                 (default 'u')

       Remove the selection of all files in all directories.

           glob-select
           glob-unselect

       Select/unselect files that match the given glob.

           calcdirsize

       Calculate the total size for each  of  the  selected  directories.  Option  'info'  should
       include  'size'  and option 'dircounts' should be disabled to show this size. If the total
       size of a directory is not calculated, it will be shown as '-'.

           copy                     (default 'y')

       If there are no selections, save the  path  of  the  current  file  to  the  copy  buffer,
       otherwise, copy the paths of selected files.

           cut                      (default 'd')

       If  there  are  no  selections,  save  the  path  of  the  current file to the cut buffer,
       otherwise, copy the paths of selected files.

           paste                    (default 'p')

       Copy/Move files in copy/cut buffer to the current  working  directory.  A  custom  'paste'
       command can be defined to override this default.

           clear                    (default 'c')

       Clear file paths in copy/cut buffer.

           sync

       Synchronize  copied/cut  files  with  server.  This  command  is automatically called when
       required.

           draw

       Draw the screen. This command is automatically called when required.

           redraw                   (default '<c-l>')

       Synchronize the terminal and redraw the screen.

           load

       Load modified files and directories. This command is automatically called when required.

           reload                   (default '<c-r>')

       Flush the cache and reload all files and directories.

           echo

       Print given arguments to the message line at the bottom.

           echomsg

       Print given arguments to the message line at the bottom and also to the log file.

           echoerr

       Print given arguments to the message line at the bottom as 'errorfmt' and also to the  log
       file.

           cd

       Change the working directory to the given argument.

           select

       Change the current file selection to the given argument.

           delete         (modal)

       Remove  the  current file or selected file(s). A custom 'delete' command can be defined to
       override this default.

           rename         (modal)   (default 'r')

       Rename the current file using the builtin method. A custom 'rename' command can be defined
       to override this default.

           source

       Read the configuration file given in the argument.

           push

       Simulate key pushes given in the argument.

           read           (modal)   (default ':')

       Read a command to evaluate.

           shell          (modal)   (default '$')

       Read a shell command to execute.

           shell-pipe     (modal)   (default '%')

       Read a shell command to execute piping its standard I/O to the bottom statline.

           shell-wait     (modal)   (default '!')

       Read a shell command to execute and wait for a key press in the end.

           shell-async    (modal)   (default '&')

       Read a shell command to execute asynchronously without standard I/O.

           find           (modal)   (default 'f')
           find-back      (modal)   (default 'F')
           find-next                (default ';')
           find-prev                (default ',')

       Read  key(s) to find the appropriate file name match in the forward/backward direction and
       jump to the next/previous match.

           search                   (default '/')
           search-back              (default '?')
           search-next              (default 'n')
           search-prev              (default 'N')

       Read a pattern to search for a file name match in the forward/backward direction and  jump
       to the next/previous match.

           filter         (modal)
           setfilter

       Command  'filter'  reads a pattern to filter out and only view files matching the pattern.
       Command 'setfilter' does the same but uses an argument to set the filter immediately.  You
       can supply an argument to 'filter', in order to use that as the starting prompt.

           mark-save      (modal)   (default 'm')

       Save the current directory as a bookmark assigned to the given key.

           mark-load      (modal)   (default "'")

       Change the current directory to the bookmark assigned to the given key. A special bookmark
       "'" holds the previous directory after a 'mark-load', 'cd', or 'select' command.

           mark-remove    (modal)   (default '"')

       Remove a bookmark assigned to the given key.

           tag

       Tag a file with '*' or a single width character given in the argument. You  can  define  a
       new  tag  clearing command by combining 'tag' with 'tag-toggle' (i.e. 'cmd tag-clear :tag;
       tag-toggle').

           tag-toggle               (default 't')

       Tag a file with '*' or a single width character given in  the  argument  if  the  file  is
       untagged, otherwise remove the tag.

COMMAND LINE COMMANDS

       The  prompt  character  specifies  which of the several command-line modes you are in. For
       example, the 'read' command takes you to the ':' mode.

       When the cursor is at the first character in ':' mode, pressing one of the keys '!',  '$',
       '%',  or  '&'  takes you to the corresponding mode. You can go back with 'cmd-delete-back'
       ('<backspace>' by default).

       The command line commands  should  be  mostly  compatible  with  readline  keybindings.  A
       character  refers  to  a  unicode code point, a word consists of letters and digits, and a
       unix word consists of any non-blank characters.

           cmd-escape               (default '<esc>')

       Quit command line mode and return to normal mode.

           cmd-complete             (default '<tab>')

       Autocomplete the current word.

           cmd-menu-complete
           cmd-menu-complete-back

       Autocomplete the current word with menu selection.  You  need  to  assign  keys  to  these
       commands (e.g. 'cmap <tab> cmd-menu-complete; cmap <backtab> cmd-menu-complete-back'). You
       can use the assigned keys assigned to display the menu and then cycle  through  completion
       options.

           cmd-menu-accept

       Accept the currently selected match in menu completion and close the menu.

           cmd-enter                (default '<c-j>' and '<enter>')

       Execute the current line.

           cmd-interrupt            (default '<c-c>')

       Interrupt the current shell-pipe command and return to the normal mode.

           cmd-history-next         (default '<c-n>' and '<down>')
           cmd-history-prev         (default '<c-p>' and '<up>')

       Go to next/previous item in the history.

           cmd-left                 (default '<c-b>' and '<left>')
           cmd-right                (default '<c-f>' and '<right>')

       Move the cursor to the left/right.

           cmd-home                 (default '<c-a>' and '<home>')
           cmd-end                  (default '<c-e>' and '<end>')

       Move the cursor to the beginning/end of line.

           cmd-delete               (default '<c-d>' and '<delete>')

       Delete the next character.

           cmd-delete-back          (default '<backspace>' and '<backspace2>')

       Delete the previous character. When at the beginning of a prompt, returns either to normal
       mode or to ':' mode.

           cmd-delete-home          (default '<c-u>')
           cmd-delete-end           (default '<c-k>')

       Delete everything up to the beginning/end of line.

           cmd-delete-unix-word     (default '<c-w>')

       Delete the previous unix word.

           cmd-yank                 (default '<c-y>')

       Paste the buffer content containing the last deleted item.

           cmd-transpose            (default '<c-t>')
           cmd-transpose-word       (default '<a-t>')

       Transpose the positions of last two characters/words.

           cmd-word                 (default '<a-f>')
           cmd-word-back            (default '<a-b>')

       Move the cursor by one word in forward/backward direction.

           cmd-delete-word          (default '<a-d>')

       Delete the next word in forward direction.

           cmd-capitalize-word      (default '<a-c>')
           cmd-uppercase-word       (default '<a-u>')
           cmd-lowercase-word       (default '<a-l>')

       Capitalize/uppercase/lowercase the current word and jump to the next word.

           maps
           cmaps

       List all key mappings in normal mode or command-line editing mode.

           jumps

       List the contents of the jump list, in order of the most recently visited locations.  Each
       location  is  marked  with the count that can be used with the `jump-prev` and `jump-next`
       commands (e.g. use `3[` to move three spaces backwards in the jump list). A '>' is used to
       mark the current location in the jump list.

OPTIONS

       This  section  shows information about options to customize the behavior. Character ':' is
       used as the separator for list options '[]int' and '[]string'.

           anchorfind     bool      (default true)

       When this option is enabled, find command starts matching patterns from the  beginning  of
       file names, otherwise, it can match at an arbitrary position.

           autoquit       bool      (default false)

       Automatically quit server when there are no clients left connected.

           cleaner        string    (default '') (not called if empty)

       Set  the  path  of  a  cleaner file. The file should be executable. This file is called if
       previewing is enabled, the previewer is set, and the  previously  selected  file  had  its
       preview  cache disabled. Five arguments are passed to the file, (1) current file name, (2)
       width, (3) height, (4) horizontal position, and (5)  vertical  position  of  preview  pane
       respectively. Preview clearing is disabled when the value of this option is left empty.

           cursoractivefmt   string    (default "\033[7m")
           cursorparentfmt   string    (default "\033[7m")
           cursorpreviewfmt  string    (default "\033[4m")

       Format  strings  for  highlighting  the  cursor.  `cursoractivefmt` applies in the current
       directory pane, `cursorparentfmt` applies in  panes  that  show  parents  of  the  current
       directory, and `cursorpreviewfmt` applies in panes that preview directories.

       The  default  is  to  make the active cursor and the parent directory cursor inverted. The
       preview cursor is underlined.

       Some other possibilities to consider for the preview or parent cursors:  an  empty  string
       for  no  cursor,  "\033[7;2m"  for  dimmed  inverted text (visibility varies by terminal),
       "\033[7;90m" for inverted text with grey (aka "brightblack") background.

       If the format string contains the characters `%s`, it is interpreted as  a  format  string
       for `fmt.Sprintf`. Such a string should end with the terminal reset sequence. For example,
       "\033[4m%s\033[0m" has the same effect as "\033[4m".

           dircache       bool      (default true)

       Cache directory contents.

           dircounts      bool      (default false)

       When this option is enabled, directory sizes show the number of items  inside  instead  of
       the  total  size  of  the directory, which needs to be calculated for each directory using
       'calcdirsize'. This information needs to  be  calculated  by  reading  the  directory  and
       counting  the  items inside. Therefore, this option is disabled by default for performance
       reasons. This option only has an effect when 'info' has a 'size' field  and  the  pane  is
       wide  enough  to  show  the  information. 999 items are counted per directory at most, and
       bigger directories are shown as '999+'.

           dirfirst       bool      (default true)

       Show directories first above regular files.

           dironly        bool      (default false)

       Show only directories.

           dirpreviews    bool      (default false)

       If enabled, directories will also be passed to the previewer script.  This  allows  custom
       previews for directories.

           drawbox        bool      (default false)

       Draw boxes around panes with box drawing characters.

           errorfmt       string    (default "\033[7;31;47m")

       Format string of error messages shown in the bottom message line.

       If  the  format  string contains the characters `%s`, it is interpreted as a format string
       for `fmt.Sprintf`. Such a string should end with the terminal reset sequence. For example,
       "\033[4m%s\033[0m" has the same effect as "\033[4m".

           filesep        string    (default "\n")

       File separator used in environment variables 'fs' and 'fx'.

           findlen        int       (default 1)

       Number  of  characters  prompted  for  the find command. When this value is set to 0, find
       command prompts until there is only a single match left.

           globsearch     bool      (default false)

       When this option is enabled, search command patterns are considered  as  globs,  otherwise
       they are literals. With globbing, '*' matches any sequence, '?' matches any character, and
       '[...]' or '[^...]' matches character sets or  ranges.  Otherwise,  these  characters  are
       interpreted as they are.

           hidden         bool      (default false)

       Show  hidden  files.  On  Unix  systems,  hidden  files  are  determined  by  the value of
       'hiddenfiles'. On Windows, only files with hidden attributes are considered hidden files.

           hiddenfiles    []string  (default '.*')

       List of hidden file glob patterns. Patterns can be given as relative  or  absolute  paths.
       Globbing  supports  the  usual special characters, '*' to match any sequence, '?' to match
       any character, and '[...]' or '[^...]' to match character sets or ranges. In addition,  if
       a  pattern  starts  with  '!',  then  its  matches  are excluded from hidden files. To add
       multiple patterns, use ':' as a separator. Example: '.*:lost+found:*.bak'

           history        bool      (default true)

       Save command history.

           icons          bool      (default false)

       Show icons before each item in the list.

           ifs            string    (default '')

       Sets 'IFS' variable in shell commands. It works by adding the assignment to the  beginning
       of  the  command  string  as  "IFS='...';  ...".  The reason is that 'IFS' variable is not
       inherited by the shell for security reasons. This method assumes a POSIX shell syntax  and
       so  it  can  fail  for  non-POSIX shells. This option has no effect when the value is left
       empty. This option does not have any effect on Windows.

           ignorecase     bool      (default true)

       Ignore case in sorting and search patterns.

           ignoredia      bool      (default true)

       Ignore diacritics in sorting and search patterns.

           incsearch      bool      (default false)

       Jump to the first match after each keystroke during searching.

           incfilter      bool      (default false)

       Apply filter pattern after each keystroke during filtering.

           info           []string  (default '')

       List of information shown for directory  items  at  the  right  side  of  pane.  Currently
       supported  information types are 'size', 'time', 'atime', and 'ctime'. Information is only
       shown when the pane width is more than twice the width of information.

           infotimefmtnew string    (default 'Jan _2 15:04')

       Format string of the file time shown in the info column when it matches this year.

           infotimefmtold string    (default 'Jan _2  2006')

       Format string of the file time shown in the info column when it doesn't match this year.

           mouse          bool      (default false)

       Send mouse events as input.

           number         bool      (default false)

       Show  the  position  number  for  directory  items  at  the  left  side  of   pane.   When
       'relativenumber'  option is enabled, only the current line shows the absolute position and
       relative positions are shown for the rest.

           numberfmt      string    (default "\033[33m")

       Format string of the position number for each line.

           period         int       (default 0)

       Set the interval in seconds for periodic  checks  of  directory  updates.  This  works  by
       periodically  calling  the  'load'  command.  Note  that  directories  are already updated
       automatically in many cases. This option can be useful when there is an  external  process
       changing the displayed directory and you are not doing anything in lf. Periodic checks are
       disabled when the value of this option is set to zero.

           preview        bool      (default true)

       Show previews of files and directories at the right most pane. If the file has more  lines
       than the preview pane, rest of the lines are not read. Files containing the null character
       (U+0000) in the read portion are considered binary files and displayed as 'binary'.

           previewer      string    (default '') (not filtered if empty)

       Set the path of a previewer file to filter the content of regular  files  for  previewing.
       The  file  should  be  executable. Five arguments are passed to the file, (1) current file
       name, (2) width, (3) height, (4) horizontal position, and (5) vertical position of preview
       pane  respectively.  SIGPIPE  signal  is sent when enough lines are read. If the previewer
       returns a non-zero exit code, then the preview cache for the given file is disabled.  This
       means  that  if  the  file  is selected in the future, the previewer is called once again.
       Preview filtering is disabled and files are displayed as they are when the value  of  this
       option is left empty.

           promptfmt      string    (default "\033[32;1m%u@%h\033[0m:\033[34;1m%d\033[0m\033[1m%f\033[0m")

       Format  string  of the prompt shown in the top line. Special expansions are provided, '%u'
       as the user name, '%h' as the host name, '%w'  as  the  working  directory,  '%d'  as  the
       working  directory  with a trailing path separator, '%f' as the file name, and '%F' as the
       current filter. '%S' may be used once and will provide a  spacer  so  that  the  following
       parts  are  right  aligned  on  the  screen.  Home  folder  is shown as '~' in the working
       directory expansion. Directory names are automatically shortened  to  a  single  character
       starting from the left most parent when the prompt does not fit to the screen.

           ratios         []int     (default '1:2:3')

       List  of ratios of pane widths. Number of items in the list determines the number of panes
       in the ui. When 'preview' option is enabled, the right most number is used for  the  width
       of preview pane.

           relativenumber bool      (default false)

       Show  the  position number relative to the current line. When 'number' is enabled, current
       line shows the absolute position, otherwise nothing is shown.

           reverse        bool      (default false)

       Reverse the direction of sort.

           ruler          []string  (default 'acc:progress:selection:filter:ind')

       List of information shown in status line ruler. Currently supported information types  are
       'acc',  'progress',  'selection',  'ind'  and 'df'. `acc` shows the pressed keys (e.g. for
       bindings with multiple key presses or counts given  to  bindings).  `progress`  shows  the
       progress of file operations (e.g. copying a large directory). `selection` shows the number
       of files that are selected, or designated for being cut/copied. `filter` shows  'F'  if  a
       filter  is currently being applied. `ind` shows the current position of the cursor as well
       as the number of files in the current directory. `df` shows the amount of free disk  space
       remaining.

           selmode        string    (default 'all')

       Selection  mode  for  commands.  When set to 'all' it will use the selected files from all
       directories. When set to 'dir' it  will  only  use  the  selected  files  in  the  current
       directory.

           scrolloff      int       (default 0)

       Minimum  number of offset lines shown at all times in the top and the bottom of the screen
       when scrolling. The current line is kept in the middle when this option is set to a  large
       value  that  is bigger than the half of number of lines. A smaller offset can be used when
       the current file is close to the beginning or end of the list to show the  maximum  number
       of items.

           shell          string    (default 'sh' for Unix and 'cmd' for Windows)

       Shell  executable  to  use  for  shell  commands.  Shell  commands  are executed as 'shell
       shellopts shellflag command -- arguments'.

           shellflag      string    (default '-c' for Unix and '/c' for Windows)

       Command line flag used to pass shell commands.

           shellopts      []string  (default '')

       List of shell options to pass to the shell executable.

           smartcase      bool      (default true)

       Override 'ignorecase' option when the pattern contains an uppercase character. This option
       has no effect when 'ignorecase' is disabled.

           smartdia       bool      (default false)

       Override  'ignoredia'  option  when  the pattern contains a character with diacritic. This
       option has no effect when 'ignoredia' is disabled.

           sortby         string    (default 'natural')

       Sort type for directories. Currently supported sort types are 'natural',  'name',  'size',
       'time', 'ctime', 'atime', and 'ext'.

           tabstop        int       (default 8)

       Number of space characters to show for horizontal tabulation (U+0009) character.

           tagfmt         string    (default "\033[31m")

       Format string of the tags.

       If  the  format  string contains the characters `%s`, it is interpreted as a format string
       for `fmt.Sprintf`. Such a string should end with the terminal reset sequence. For example,
       "\033[4m%s\033[0m" has the same effect as "\033[4m".

           tempmarks      string    (default '')

       Marks  to  be  considered  temporary (e.g. 'abc' refers to marks 'a', 'b', and 'c'). These
       marks are not synced to other clients and they are not saved in the bookmarks  file.  Note
       that  the  special  bookmark "'" is always treated as temporary and it does not need to be
       specified.

           timefmt        string    (default 'Mon Jan _2 15:04:05 2006')

       Format string of the file modification time shown in the bottom line.

           truncatechar   string    (default '~')

       Truncate character shown at the end when the file name does not fit to the pane.

           waitmsg        string    (default 'Press any key to continue')

       String shown after commands of shell-wait type.

           wrapscan       bool      (default true)

       Searching can wrap around the file list.

           wrapscroll     bool      (default false)

       Scrolling can wrap around the file list.

           user_{option}  string    (default none)

       Any option that is prefixed with 'user_' is a user defined option and can be  set  to  any
       string. Inside a user defined command the value will be provided in the `lf_user_{option}`
       environment variable. These options are not used by lf and are not persisted.

ENVIRONMENT VARIABLES

       The following variables are exported for shell commands: These are  referred  with  a  '$'
       prefix  on  POSIX  shells (e.g. '$f'), between '%' characters on Windows cmd (e.g. '%f%'),
       and with a '$env:' prefix on Windows powershell (e.g. '$env:f').

           f

       Current file selection as a full path.

           fs

       Selected file(s) separated with the value of 'filesep' option as full path(s).

           fx

       Selected file(s) (i.e. 'fs') if there are  any  selected  files,  otherwise  current  file
       selection (i.e. 'f').

           id

       Id of the running client.

           PWD

       Present working directory.

           OLDPWD

       Initial working directory.

           LF_LEVEL

       The  value  of  this  variable  is set to the current nesting level when you run lf from a
       shell spawned inside lf. You can add the value of this variable to your  shell  prompt  to
       make  it clear that your shell runs inside lf. For example, with POSIX shells, you can use
       '[ -n "$LF_LEVEL" ] && PS1="$PS1""(lf level: $LF_LEVEL) "'  in  your  shell  configuration
       file (e.g. '~/.bashrc').

           OPENER

       If  this variable is set in the environment, use the same value. Otherwise, this is set to
       'start' in Windows, 'open' in MacOS, 'xdg-open' in others.

           EDITOR

       If VISUAL is set in the environment, use its  value.  Otherwise,  use  the  value  of  the
       environment  variable  EDITOR.  If  neither  variable is set, this is set to 'vi' on Unix,
       'notepad' in Windows.

           PAGER

       If this variable is set in the environment, use the same value. Otherwise, this is set  to
       'less' on Unix, 'more' in Windows.

           SHELL

       If  this variable is set in the environment, use the same value. Otherwise, this is set to
       'sh' on Unix, 'cmd' in Windows.

           lf

       Absolute path to the currently running lf binary, if it can be found. Otherwise,  this  is
       set to the string 'lf'.

           lf_{option}

       Value of the {option}.

           lf_user_{option}

       Value of the user_{option}.

           lf_width
           lf_height

       Width/Height of the terminal.

           lf_count

       Value of the count associated with the current command.

SPECIAL COMMANDS

       This section shows information about special shell commands.

           open

       This  shell command can be defined to override the default 'open' command when the current
       file is not a directory.

           paste

       This shell command can be defined to override the default 'paste' command.

           rename

       This shell command can be defined to override the default 'rename' command.

           delete

       This shell command can be defined to override the default 'delete' command.

           pre-cd

       This shell command can be defined to be executed before changing a directory.

           on-cd

       This shell command can be defined to be executed after changing a directory.

           on-select

       This shell command can be defined to be executed after the selection changes.

           on-quit

       This shell command can be defined to be executed before quit.

PREFIXES

       The following command prefixes are used by lf:

           :  read (default)  builtin/custom command
           $  shell           shell command
           %  shell-pipe      shell command running with the ui
           !  shell-wait      shell command waiting for key press
           &  shell-async     shell command running asynchronously

       The same evaluator is used for the command line and the configuration file  for  read  and
       shell  commands.  The  difference  is that prefixes are not necessary in the command line.
       Instead, different modes are provided to read  corresponding  commands.  These  modes  are
       mapped to the prefix keys above by default.

SYNTAX

       Characters from '#' to newline are comments and ignored:

           # comments start with '#'

       There are four special commands ('set', 'map', 'cmap', and 'cmd') for configuration.

       Command 'set' is used to set an option which can be boolean, integer, or string:

           set hidden         # boolean enable
           set hidden true    # boolean enable
           set nohidden       # boolean disable
           set hidden false   # boolean disable
           set hidden!        # boolean toggle
           set scrolloff 10   # integer value
           set sortby time    # string value w/o quotes
           set sortby 'time'  # string value with single quotes (whitespaces)
           set sortby "time"  # string value with double quotes (backslash escapes)

       Command  'map'  is  used  to  bind a key to a command which can be builtin command, custom
       command, or shell command:

           map gh cd ~        # builtin command
           map D trash        # custom command
           map i $less $f     # shell command
           map U !du -csh *   # waiting shell command

       Command 'cmap' is used to bind a key on the command line to a command line command or  any
       other command:

           cmap <c-g> cmd-escape
           cmap <a-i> set incsearch!

       You can delete an existing binding by leaving the expression empty:

           map gh             # deletes 'gh' mapping
           cmap <c-g>         # deletes '<c-g>' mapping

       Command 'cmd' is used to define a custom command:

           cmd usage $du -h -d1 | less

       You can delete an existing command by leaving the expression empty:

           cmd trash          # deletes 'trash' command

       If there is no prefix then ':' is assumed:

           map zt set info time

       An  explicit  ':'  can be provided to group statements until a newline which is especially
       useful for 'map' and 'cmd' commands:

           map st :set sortby time; set info time

       If you need multiline you can wrap statements in '{{' and '}}' after the proper prefix.

           map st :{{
               set sortby time
               set info time
           }}

KEY MAPPINGS

       Regular keys are assigned to a command with the usual syntax:

           map a down

       Keys combined with the shift key simply use the uppercase letter:

           map A down

       Special keys are written in between '<'  and  '>'  characters  and  always  use  lowercase
       letters:

           map <enter> down

       Angle brackets can be assigned with their special names:

           map <lt> down
           map <gt> down

       Function keys are prefixed with 'f' character:

           map <f-1> down

       Keys combined with the control key are prefixed with 'c' character:

           map <c-a> down

       Keys  combined  with  the  alt  key  are  assigned  in two different ways depending on the
       behavior of your terminal. Older terminals (e.g. xterm) may set the 8th bit of a character
       when  the  alt  key is pressed. On these terminals, you can use the corresponding byte for
       the mapping:

           map รก down

       Newer terminals (e.g. gnome-terminal) may prefix the key with an escape key when  the  alt
       key  is  pressed.  lf  uses  the  escape delaying mechanism to recognize alt keys in these
       terminals (delay is 100ms). On these  terminals,  keys  combined  with  the  alt  key  are
       prefixed with 'a' character:

           map <a-a> down

       Please  note  that,  some  key combinations are not possible due to the way terminals work
       (e.g. control and h combination sends a backspace key instead). The easiest  way  to  find
       the name of a key combination is to press the key while lf is running and read the name of
       the key from the unknown mapping error.

       Mouse buttons are prefixed with 'm' character:

           map <m-1> down  # primary
           map <m-2> down  # secondary
           map <m-3> down  # middle
           map <m-4> down
           map <m-5> down
           map <m-6> down
           map <m-7> down
           map <m-8> down

       Mouse wheel events are also prefixed with 'm' character:

           map <m-up>    down
           map <m-down>  down
           map <m-left>  down
           map <m-right> down

PUSH MAPPINGS

       The usual way to map a key sequence is to assign it to a named or unnamed  command.  While
       this  provides  a  clean  way  to  remap builtin keys as well as other commands, it can be
       limiting at times. For this reason 'push' command is provided by lf. This command is  used
       to  simulate  key  pushes  given as its arguments. You can 'map' a key to a 'push' command
       with an argument to create various keybindings.

       This is mainly useful for two purposes. First, it can be used to  map  a  command  with  a
       command count:

           map <c-j> push 10j

       Second, it can be used to avoid typing the name when a command takes arguments:

           map r push :rename<space>

       One  thing  to be careful is that since 'push' command works with keys instead of commands
       it is possible to accidentally create recursive bindings:

           map j push 2j

       These types of bindings create a deadlock when executed.

SHELL COMMANDS

       Regular shell commands are the most basic command type that is useful for  many  purposes.
       For  example,  we  can  write  a  shell command to move selected file(s) to trash. A first
       attempt to write such a command may look like this:

           cmd trash ${{
               mkdir -p ~/.trash
               if [ -z "$fs" ]; then
                   mv "$f" ~/.trash
               else
                   IFS="$(printf '\n\t')"; mv $fs ~/.trash
               fi
           }}

       We check '$fs' to see if there are any  selected  files.  Otherwise  we  just  delete  the
       current  file. Since this is such a common pattern, a separate '$fx' variable is provided.
       We can use this variable to get rid of the conditional:

           cmd trash ${{
               mkdir -p ~/.trash
               IFS="$(printf '\n\t')"; mv $fx ~/.trash
           }}

       The trash directory is checked each time the command is executed. We can move  it  outside
       of the command so it would only run once at startup:

           ${{ mkdir -p ~/.trash }}

           cmd trash ${{ IFS="$(printf '\n\t')"; mv $fx ~/.trash }}

       Since these are one liners, we can drop '{{' and '}}':

           $mkdir -p ~/.trash

           cmd trash $IFS="$(printf '\n\t')"; mv $fx ~/.trash

       Finally  note  that we set 'IFS' variable manually in these commands. Instead we could use
       the 'ifs' option to set it for all shell commands (i.e.  'set  ifs  "\n"').  This  can  be
       especially useful for interactive use (e.g. '$rm $f' or '$rm $fs' would simply work). This
       option is not set by default as it can behave unexpectedly for new users. However, use  of
       this option is highly recommended and it is assumed in the rest of the documentation.

PIPING SHELL COMMANDS

       Regular  shell  commands  have  some  limitations  in  some cases. When an output or error
       message is given and the command exits afterwards, the ui is immediately resumed and there
       is  no way to see the message without dropping to shell again. Also, even when there is no
       output or error, the ui still needs to be paused while the command is  running.  This  can
       cause  flickering  on  the  screen  for short commands and similar distractions for longer
       commands.

       Instead of pausing the ui, piping shell commands connects stdin, stdout, and stderr of the
       command to the statline in the bottom of the ui. This can be useful for programs following
       the Unix philosophy to give no output in the success case, and  brief  error  messages  or
       prompts in other cases.

       For example, following rename command prompts for overwrite in the statline if there is an
       existing file with the given name:

           cmd rename %mv -i $f $1

       You can also output error messages in the command and it will show up in the statline. For
       example, an alternative rename command may look like this:

           cmd rename %[ -e $1 ] && printf "file exists" || mv $f $1

       Note that input is line buffered and output and error are byte buffered.

WAITING SHELL COMMANDS

       Waiting  shell  commands are similar to regular shell commands except that they wait for a
       key press when the command is finished. These can be useful to see the output of a program
       before  the  ui  is resumed. Waiting shell commands are more appropriate than piping shell
       commands when the command is verbose and the output is best displayed as multiline.

ASYNCHRONOUS SHELL COMMANDS

       Asynchronous shell commands are used to start a command in the background and then  resume
       operation  without  waiting  for  the  command to finish. Stdin, stdout, and stderr of the
       command is neither connected to the terminal nor to the ui.

REMOTE COMMANDS

       One of the more advanced features in lf is remote  commands.  All  clients  connect  to  a
       server  on startup. It is possible to send commands to all or any of the connected clients
       over the common server. This is used internally to notify file selection changes to  other
       clients.

       To  use  this  feature,  you need to use a client which supports communicating with a Unix
       domain socket. OpenBSD implementation of netcat (nc) is one such example. You can  use  it
       to send a command to the socket file:

           echo 'send echo hello world' | nc -U ${XDG_RUNTIME_DIR:-/tmp}/lf.${USER}.sock

       Since  such a client may not be available everywhere, lf comes bundled with a command line
       flag to be used as such. When using lf, you do not need to  specify  the  address  of  the
       socket  file. This is the recommended way of using remote commands since it is shorter and
       immune to socket file address changes:

           lf -remote 'send echo hello world'

       In this command 'send' is used to send the  rest  of  the  string  as  a  command  to  all
       connected  clients.  You can optionally give it an id number to send a command to a single
       client:

           lf -remote 'send 1234 echo hello world'

       All clients have a unique id number but you may not be aware of the id number when you are
       writing  a command. For this purpose, an '$id' variable is exported to the environment for
       shell commands. The value of this variable is set to the process id of the client. You can
       use  it  to  send  a  remote  command  from a client to the server which in return sends a
       command back to itself. So now you can display a message in the current client by  calling
       the following in a shell command:

           lf -remote "send $id echo hello world"

       Since  lf  does not have control flow syntax, remote commands are used for such needs. For
       example, you can configure the number of columns in the ui with respect  to  the  terminal
       width as follows:

           cmd recol %{{
               if [ $lf_width -le 80 ]; then
                   lf -remote "send $id set ratios 1:2"
               elif [ $lf_width -le 160 ]; then
                   lf -remote "send $id set ratios 1:2:3"
               else
                   lf -remote "send $id set ratios 1:2:3:5"
               fi
           }}

       Besides  'send'  command,  there  is a 'quit' command to quit the server when there are no
       connected clients left, and a 'quit!' command to force quit the server by  closing  client
       connections first:

           lf -remote 'quit'
           lf -remote 'quit!'

       Lastly,  there  is  a 'conn' command to connect the server as a client. This should not be
       needed for users.

FILE OPERATIONS

       lf uses its own builtin copy and move operations by  default.  These  are  implemented  as
       asynchronous  operations  and progress is shown in the bottom ruler. These commands do not
       overwrite existing files or directories with the same name.  Instead,  a  suffix  that  is
       compatible  with  '--backup=numbered'  option  in  GNU  cp  is  added  to the new files or
       directories. Only file modes are preserved and all other attributes are ignored  including
       ownership,  timestamps,  context,  and  xattr.  Special  files such as character and block
       devices, named pipes, and sockets are skipped  and  links  are  not  followed.  Moving  is
       performed  using  the  rename  operation of the underlying OS. For cross-device moving, lf
       falls back to copying and then  deletes  the  original  files  if  there  are  no  errors.
       Operation  errors  are  shown  in the message line as well as the log file and they do not
       preemptively finish the corresponding file operation.

       File operations can be performed on the current selected file or alternatively on multiple
       files  by  selecting them first. When you 'copy' a file, lf doesn't actually copy the file
       on the disk, but only records its name to a file. The actual file copying takes place when
       you 'paste'. Similarly 'paste' after a 'cut' operation moves the file.

       You  can  customize  copy  and  move  operations  by defining a 'paste' command. This is a
       special command that is called when it is defined instead of the  builtin  implementation.
       You can use the following example as a starting point:

           cmd paste %{{
               load=$(cat ~/.local/share/lf/files)
               mode=$(echo "$load" | sed -n '1p')
               list=$(echo "$load" | sed '1d')
               if [ $mode = 'copy' ]; then
                   cp -R $list .
               elif [ $mode = 'move' ]; then
                   mv $list .
                   rm ~/.local/share/lf/files
                   lf -remote 'send clear'
               fi
           }}

       Some  useful  things  to  be considered are to use the backup ('--backup') and/or preserve
       attributes ('-a') options with 'cp' and  'mv'  commands  if  they  support  it  (i.e.  GNU
       implementation),  change  the  command  type  to asynchronous, or use 'rsync' command with
       progress bar option for copying and feed the progress  to  the  client  periodically  with
       remote 'echo' calls.

       By  default,  lf  does  not assign 'delete' command to a key to protect new users. You can
       customize file deletion by defining a 'delete' command. You can also assign a key to  this
       command  if  you  like.  An  example  command to move selected files to a trash folder and
       remove files completely after a prompt are provided in the example configuration file.

SEARCHING FILES

       There are two mechanisms implemented in lf to search a  file  in  the  current  directory.
       Searching  is  the  traditional  method  to  move the selection to a file matching a given
       pattern. Finding is an alternative way to  search  for  a  pattern  possibly  using  fewer
       keystrokes.

       Searching  mechanism  is  implemented  with commands 'search' (default '/'), 'search-back'
       (default '?'), 'search-next' (default 'n'),  and  'search-prev'  (default  'N').  You  can
       enable  'globsearch'  option  to match with a glob pattern. Globbing supports '*' to match
       any sequence, '?' to match any character, and '[...]' or '[^...] to match  character  sets
       or  ranges.  You  can  enable  'incsearch'  option  to  jump  to the current match at each
       keystroke while typing. In this mode, you can either use 'cmd-enter' to accept the  search
       or use 'cmd-escape' to cancel the search. You can also map some other commands with 'cmap'
       to accept the search and execute the command immediately afterwards. For example, you  can
       use the right arrow key to finish the search and open the selected file with the following
       mapping:

           cmap <right> :cmd-enter; open

       Finding mechanism is implemented with commands 'find' (default 'f'), 'find-back'  (default
       'F'),  'find-next'  (default ';'), 'find-prev' (default ','). You can disable 'anchorfind'
       option to match a pattern at  an  arbitrary  position  in  the  filename  instead  of  the
       beginning. You can set the number of keys to match using 'findlen' option. If you set this
       value to zero, then the the keys are read until there is  only  a  single  match.  Default
       values of these two options are set to jump to the first file with the given initial.

       Some  options  effect  both  searching  and  finding. You can disable 'wrapscan' option to
       prevent searches to wrap around at the end of the file list. You can disable  'ignorecase'
       option  to  match  cases  in  the  pattern  and  the  filename.  This  option  is  already
       automatically overridden if the pattern contains upper case characters.  You  can  disable
       'smartcase'  option  to  disable  this  behavior.  Two  similar  options  'ignoredia'  and
       'smartdia' are provided to control matching diacritics in latin letters.

OPENING FILES

       You can define a an 'open' command (default 'l' and '<right>') to configure file  opening.
       This  command  is  only  called  when  the  current file is not a directory, otherwise the
       directory is entered instead. You can define  it  just  as  you  would  define  any  other
       command:

           cmd open $vi $fx

       It is possible to use different command types:

           cmd open &xdg-open $f

       You may want to use either file extensions or mime types from 'file' command:

           cmd open ${{
               case $(file --mime-type -Lb $f) in
                   text/*) vi $fx;;
                   *) for f in $fx; do xdg-open $f > /dev/null 2> /dev/null & done;;
               esac
           }}

       You  may want to use 'setsid' before your opener command to have persistent processes that
       continue to run after lf quits.

       Regular shell commands (i.e. '$') drop to terminal which results in a flicker for commands
       that  finishes  immediately  (e.g.  'xdg-open'  in  the above example). If you want to use
       asynchronous shell commands (i.e. '&') but also want to use the  terminal  when  necessary
       (e.g. 'vi' in the above exxample), you can use a remote command:

           cmd open &{{
               case $(file --mime-type -Lb $f) in
                   text/*) lf -remote "send $id \$vi \$fx";;
                   *) for f in $fx; do xdg-open $f > /dev/null 2> /dev/null & done;;
               esac
           }}

       Note, asynchronous shell commands run in their own process group by default so they do not
       require the manual use of 'setsid'.

       Following command is provided by default:

           cmd open &$OPENER $f

       You may also use any other existing  file  openers  as  you  like.  Possible  options  are
       'libfile-mimeinfo-perl'  (executable  name  is 'mimeopen'), 'rifle' (ranger's default file
       opener), or 'mimeo' to name a few.

PREVIEWING FILES

       lf previews files on the preview pane by printing the file until the end  or  the  preview
       pane  is  filled.  This  output  can  be enhanced by providing a custom preview script for
       filtering. This can be used to highlight source codes, list contents of archive  files  or
       view pdf or image files to name a few. For coloring lf recognizes ansi escape codes.

       In  order  to use this feature you need to set the value of 'previewer' option to the path
       of an executable file. Five arguments are passed to the file, (1) current file  name,  (2)
       width,  (3)  height,  (4)  horizontal  position, and (5) vertical position of preview pane
       respectively. Output of the execution is printed in the preview pane. You may also want to
       use the same script in your pager mapping as well:

           set previewer ~/.config/lf/pv.sh
           map i $~/.config/lf/pv.sh $f | less -R

       For  'less' pager, you may instead utilize 'LESSOPEN' mechanism so that useful information
       about the file such as the full path of the file can still be displayed in the  statusline
       below:

           set previewer ~/.config/lf/pv.sh
           map i $LESSOPEN='| ~/.config/lf/pv.sh %s' less -R $f

       Since  this script is called for each file selection change it needs to be as efficient as
       possible and this responsibility is left to the user.  You  may  use  file  extensions  to
       determine  the  type of file more efficiently compared to obtaining mime types from 'file'
       command. Extensions can then be used to match cleanly within a conditional:

           #!/bin/sh

           case "$1" in
               *.tar*) tar tf "$1";;
               *.zip) unzip -l "$1";;
               *.rar) unrar l "$1";;
               *.7z) 7z l "$1";;
               *.pdf) pdftotext "$1" -;;
               *) highlight -O ansi "$1";;
           esac

       Another important consideration for efficiency is the use of programs with  short  startup
       times  for  preview.  For  this  reason,  'highlight' is recommended over 'pygmentize' for
       syntax highlighting. Besides, it is also important that the application is processing  the
       file  on  the  fly  rather  than first reading it to the memory and then do the processing
       afterwards. This is especially  relevant  for  big  files.  lf  automatically  closes  the
       previewer  script  output  pipe with a SIGPIPE when enough lines are read. When everything
       else fails, you can make use of the height argument to only feed the first portion of  the
       file  to a program for preview. Note that some programs may not respond well to SIGPIPE to
       exit with a non-zero return code and avoid caching. You  may  add  a  trailing  '||  true'
       command to avoid such errors:

           highlight -O ansi "$1" || true

       You may also use an existing preview filter as you like. Your system may already come with
       a preview filter named 'lesspipe'.  These  filters  may  have  a  mechanism  to  add  user
       customizations as well. See the related documentations for more information.

CHANGING DIRECTORY

       lf  changes  the  working  directory of the process to the current directory so that shell
       commands always work in the  displayed  directory.  After  quitting,  it  returns  to  the
       original directory where it is first launched like all shell programs. If you want to stay
       in the current directory after quitting, you can use one of the example lfcd wrapper shell
       scripts provided in the repository at https://github.com/gokcehan/lf/tree/master/etc

       There  is  a  special command 'on-cd' that runs a shell command when it is defined and the
       directory is changed. You can define it just as you would define any other command:

           cmd on-cd &{{
               # display git repository status in your prompt
               source /usr/share/git/completion/git-prompt.sh
               GIT_PS1_SHOWDIRTYSTATE=auto
               GIT_PS1_SHOWSTASHSTATE=auto
               GIT_PS1_SHOWUNTRACKEDFILES=auto
               GIT_PS1_SHOWUPSTREAM=auto
               git=$(__git_ps1 " (%s)") || true
               fmt="\033[32;1m%u@%h\033[0m:\033[34;1m%d\033[0m\033[1m%f$git\033[0m"
               lf -remote "send $id set promptfmt \"$fmt\""
           }}

       If you want to print escape sequences, you may redirect 'printf' output to '/dev/tty'. The
       following xterm specific escape sequence sets the terminal title to the working directory:

           cmd on-cd &{{
               printf "\033]0; $PWD\007" > /dev/tty
           }}

       This  command  runs whenever you change directory but not on startup. You can add an extra
       call to make it run on startup as well:

           cmd on-cd &{{ ... }}
           on-cd

       Note that all shell commands are possible but '%' and '&' are usually more appropriate  as
       '$' and '!' causes flickers and pauses respectively.

       There is also a 'pre-cd' command, that works like 'on-cd', but is run before the directory
       is actually changed.

COLORS

       lf tries to automatically adapt its colors to the environment. It starts  with  a  default
       colorscheme  and updates colors using values of existing environment variables possibly by
       overwriting its previous values. Colors are set in the following order:

        1. default
        2. LSCOLORS (Mac/BSD ls)
        3. LS_COLORS (GNU ls)
        4. LF_COLORS (lf specific)
        5. colors file (lf specific)

       Please refer to the corresponding man pages for  more  information  about  'LSCOLORS'  and
       'LS_COLORS'.  'LF_COLORS' is provided with the same syntax as 'LS_COLORS' in case you want
       to configure colors only for lf but not ls. This  can  be  useful  since  there  are  some
       differences  between  ls  and  lf,  though  one should expect the same behavior for common
       cases. Colors file is provided for easier  configuration  without  environment  variables.
       This  file  should  consist  of  whitespace  separated  pairs  with '#' character to start
       comments until the end of line.

       You can configure lf colors in two different ways. First, you can only configure  8  basic
       colors  used  by your terminal and lf should pick up those colors automatically. Depending
       on your terminal, you should be able to select your colors from a 24-bit palette. This  is
       the recommended approach as colors used by other programs will also match each other.

       Second, you can set the values of environment variables or colors file mentioned above for
       fine grained  customization.  Note  that  'LS_COLORS/LF_COLORS'  are  more  powerful  than
       'LSCOLORS'  and  they  can be used even when GNU programs are not installed on the system.
       You can combine this second method with the first method for best results.

       Lastly, you may also want to configure the colors of the prompt line to match the rest  of
       the colors. Colors of the prompt line can be configured using the 'promptfmt' option which
       can include hardcoded colors as ansi escapes. See the default value of this option to have
       an idea about how to color this line.

       It  is  worth  noting  that  lf uses as many colors advertised by your terminal's entry in
       terminfo or infocmp databases on your system. If an entry is not present, it falls back to
       an  internal  database. If your terminal supports 24-bit colors but either does not have a
       database entry or does not advertise all capabilities, you can enable support  by  setting
       the  '$COLORTERM'  variable to 'truecolor' or ensuring '$TERM' is set to a value that ends
       with '-truecolor'.

       Default lf colors are mostly taken from GNU dircolors defaults. These defaults use 8 basic
       colors and bold attribute. Default dircolors entries with background colors are simplified
       to avoid confusion with current file selection in lf. Similarly, there are only file  type
       matchings  and  extension  matchings  are  left  out for simplicity. Default values are as
       follows given with their matching order in lf:

           ln  01;36
           or  31;01
           tw  01;34
           ow  01;34
           st  01;34
           di  01;34
           pi  33
           so  01;35
           bd  33;01
           cd  33;01
           su  01;32
           sg  01;32
           ex  01;32
           fi  00

       Note that lf first tries matching file names and then falls back to file types.  The  full
       order of matchings from most specific to least are as follows:

        1. Full Path (e.g. '~/.config/lf/lfrc')
        2. Dir Name (e.g. '.git/') (only matches dirs with a trailing slash at the end)
        3. File Type (e.g. 'ln') (except 'fi')
        4. File Name (e.g. 'README*')
        5. File Name (e.g. '*README')
        6. Base Name (e.g. 'README.*')
        7. Extension (e.g. '*.txt')
        8. Default (i.e. 'fi')

       For  example,  given  a regular text file '/path/to/README.txt', the following entries are
       checked in the configuration and the first one to match is used:

        1. '/path/to/README.txt'
        2. (skipped since the file is not a directory)
        3. (skipped since the file is of type 'fi')
        4. 'README.txt*'
        5. '*README.txt'
        6. 'README.*'
        7. '*.txt'
        8. 'fi'

       Given a regular directory '/path/to/example.d', the following entries are checked  in  the
       configuration and the first one to match is used:

        1. '/path/to/example.d'
        2. 'example.d/'
        3. 'di'
        4. 'example.d*'
        5. '*example.d'
        6. 'example.*'
        7. '*.d'
        8. 'fi'

       Note  that  glob-like  patterns  do  not actually perform glob matching due to performance
       reasons.

       For example, you can set a variable as follows:

           export LF_COLORS="~/Documents=01;31:~/Downloads=01;31:~/.local/share=01;31:~/.config/lf/lfrc=31:.git/=01;32:.git*=32:*.gitignore=32:*Makefile=32:README.*=33:*.txt=34:*.md=34:ln=01;36:di=01;34:ex=01;32:"

       Having all entries on a single line can make it hard to read. You may instead divide it to
       multiple lines in between double quotes by escaping newlines with backslashes as follows:

           export LF_COLORS="\
           ~/Documents=01;31:\
           ~/Downloads=01;31:\
           ~/.local/share=01;31:\
           ~/.config/lf/lfrc=31:\
           .git/=01;32:\
           .git*=32:\
           *.gitignore=32:\
           *Makefile=32:\
           README.*=33:\
           *.txt=34:\
           *.md=34:\
           ln=01;36:\
           di=01;34:\
           ex=01;32:\
           "

       Having such a long variable definition in a shell configuration file might be undesirable.
       You may instead use the colors file for configuration. A sample colors file can  be  found
       at https://github.com/gokcehan/lf/blob/master/etc/colors.example You may also see the wiki
       page for ansi escape codes https://en.wikipedia.org/wiki/ANSI_escape_code

ICONS

       Icons are configured using 'LF_ICONS' environment variable or an icons file. The  variable
       uses  the same syntax as 'LS_COLORS/LF_COLORS'. Instead of colors, you should put a single
       characters as values of entries. Icons file should consist of whitespace  separated  pairs
       with  '#'  character  to  start  comments  until  the end of line. Do not forget to enable
       'icons' option to see the icons. Default values are as follows given with  their  matching
       order in lf:

           ln  l
           or  l
           tw  t
           ow  d
           st  t
           di  d
           pi  p
           so  s
           bd  b
           cd  c
           su  u
           sg  g
           ex  x
           fi  -

       A         sample         icons         file         can         be         found        at
       https://github.com/gokcehan/lf/blob/master/etc/icons.example

                                                                                            LF(1)