Provided by: man-db_2.12.0-3_amd64 bug

NAME

       man - an interface to the system reference manuals

SYNOPSIS

       man [man options] [[section] page ...] ...
       man -k [apropos options] regexp ...
       man -K [man options] [section] term ...
       man -f [whatis options] page ...
       man -l [man options] file ...
       man -w|-W [man options] page ...

DESCRIPTION

       man is the system's manual pager.  Each page argument given to man is normally the name of
       a program, utility or function.  The manual page associated with each of  these  arguments
       is then found and displayed.  A section, if provided, will direct man to look only in that
       section of the manual.  The default action is to search in all of the  available  sections
       following  a pre-defined order (see DEFAULTS), and to show only the first page found, even
       if page exists in several sections.

       The table below shows the section numbers of the manual followed by  the  types  of  pages
       they contain.

       1   Executable programs or shell commands
       2   System calls (functions provided by the kernel)
       3   Library calls (functions within program libraries)
       4   Special files (usually found in /dev)
       5   File formats and conventions, e.g. /etc/passwd
       6   Games
       7   Miscellaneous  (including  macro  packages  and  conventions),  e.g. man(7), groff(7),
           man-pages(7)
       8   System administration commands (usually only for root)
       9   Kernel routines [Non standard]

       A manual page consists of several sections.

       Conventional section names include NAME, SYNOPSIS,  CONFIGURATION,  DESCRIPTION,  OPTIONS,
       EXIT STATUS,  RETURN VALUE,  ERRORS, ENVIRONMENT, FILES, VERSIONS, STANDARDS, NOTES, BUGS,
       EXAMPLE, AUTHORS, and SEE ALSO.

       The following conventions apply to the SYNOPSIS section and can be  used  as  a  guide  in
       other sections.

       bold text          type exactly as shown.
       italic text        replace with appropriate argument.
       [-abc]             any or all arguments within [ ] are optional.
       -a|-b              options delimited by | cannot be used together.
       argument ...       argument is repeatable.
       [expression] ...   entire expression within [ ] is repeatable.

       Exact  rendering  may vary depending on the output device.  For instance, man will usually
       not be able to render  italics  when  running  in  a  terminal,  and  will  typically  use
       underlined or coloured text instead.

       The  command  or  function  illustration  is  a  pattern  that  should  match all possible
       invocations.  In some cases it is advisable to illustrate several exclusive invocations as
       is shown in the SYNOPSIS section of this manual page.

EXAMPLES

       man ls
           Display the manual page for the item (program) ls.

       man man.7
           Display the manual page for macro package man from section 7.  (This is an alternative
           spelling of "man 7 man".)

       man 'man(7)'
           Display the manual page for macro package  man  from  section  7.   (This  is  another
           alternative  spelling  of  "man  7  man".   It may be more convenient when copying and
           pasting cross-references to manual pages.  Note that the parentheses must normally  be
           quoted to protect them from the shell.)

       man -a intro
           Display,  in  succession, all of the available intro manual pages contained within the
           manual.  It is possible to quit between successive displays or skip any of them.

       man -t bash | lpr -Pps
           Format the manual page for bash into the default troff or groff format and pipe it  to
           the printer named ps.  The default output for groff is usually PostScript.  man --help
           should advise as to which processor is bound to the -t option.

       man -l -Tdvi ./foo.1x.gz > ./foo.1x.dvi
           This command will decompress and format the nroff source manual page ./foo.1x.gz  into
           a  device  independent (dvi) file.  The redirection is necessary as the -T flag causes
           output to be directed to stdout with no pager.  The output  could  be  viewed  with  a
           program  such  as  xdvi  or  further processed into PostScript using a program such as
           dvips.

       man -k printf
           Search the short descriptions and manual page names for the keyword printf as  regular
           expression.  Print out any matches.  Equivalent to apropos printf.

       man -f smail
           Lookup  the  manual  pages referenced by smail and print out the short descriptions of
           any found.  Equivalent to whatis smail.

OVERVIEW

       Many options are available to man in order to give as much flexibility as possible to  the
       user.   Changes can be made to the search path, section order, output processor, and other
       behaviours and operations detailed below.

       If set, various environment variables are interrogated to determine the operation of  man.
       It  is  possible  to  set  the  "catch-all" variable $MANOPT to any string in command line
       format, with the exception that any spaces used as part of an option's  argument  must  be
       escaped  (preceded  by  a  backslash).   man  will  parse $MANOPT prior to parsing its own
       command line.  Those options requiring an argument will be overridden by the same  options
       found  on  the  command  line.   To  reset  all  of  the options set in $MANOPT, -D can be
       specified as the initial command line option.  This will allow man to "forget"  about  the
       options specified in $MANOPT, although they must still have been valid.

       Manual   pages  are  normally  stored  in  nroff(1)  format  under  a  directory  such  as
       /usr/share/man.  In some installations, there  may  also  be  preformatted  cat  pages  to
       improve performance.  See manpath(5) for details of where these files are stored.

       This  package  supports manual pages in multiple languages, controlled by your locale.  If
       your system did not set  this  up  for  you  automatically,  then  you  may  need  to  set
       $LC_MESSAGES,  $LANG,  or  another  system-dependent environment variable to indicate your
       preferred locale, usually specified in the POSIX format:

       <language>[_<territory>[.<character-set>[,<version>]]]

       If the desired page is available in your locale, it will  be  displayed  in  lieu  of  the
       standard (usually American English) page.

       If  you  find  that  the translations supplied with this package are not available in your
       native language and you would like to supply them, please contact the maintainer who  will
       be coordinating such activity.

       Individual  manual  pages  are  normally  written and maintained by the maintainers of the
       program, function, or other topic that they document,  and  are  not  included  with  this
       package.   If  you find that a manual page is missing or inadequate, please report that to
       the maintainers of the package in question.

       For information regarding other features and extensions available with this manual  pager,
       please read the documents supplied with the package.

DEFAULTS

       The  order of sections to search may be overridden by the environment variable $MANSECT or
       by the SECTION directive in /etc/manpath.config.  By default it is as follows:

              1 n l 8 3 0 2 3type 3posix 3pm 3perl 3am 5 4 9 6 7

       The formatted manual page is displayed using a pager.  This can be specified in  a  number
       of ways, or else will fall back to a default (see option -P for details).

       The  filters  are deciphered by a number of means.  Firstly, the command line option -p or
       the environment variable $MANROFFSEQ  is  interrogated.   If  -p  was  not  used  and  the
       environment  variable  was  not  set,  the  initial line of the nroff file is parsed for a
       preprocessor string.  To contain a valid preprocessor string, the first line must resemble

       '\" <string>

       where string can be any combination of letters described by option -p below.

       If none of the above methods provide any filter information, a default set is used.

       A formatting pipeline is formed from the filters  and  the  primary  formatter  (nroff  or
       [tg]roff  with  -t)  and executed.  Alternatively, if an executable program mandb_nfmt (or
       mandb_tfmt with -t) exists in the man tree root, it is executed instead.  It  gets  passed
       the  manual source file, the preprocessor string, and optionally the device specified with
       -T or -E as arguments.

OPTIONS

       Non-argument options that are duplicated either on the command line, in $MANOPT, or  both,
       are not harmful.  For options that require an argument, each duplication will override the
       previous argument value.

   General options
       -C file, --config-file=file
              Use this user configuration file rather than the default of ~/.manpath.

       -d, --debug
              Print debugging information.

       -D, --default
              This option is normally issued as the very first option and resets man's  behaviour
              to  its  default.   Its  use  is  to  reset those options that may have been set in
              $MANOPT.  Any options that follow -D will have their usual effect.

       --warnings[=warnings]
              Enable warnings from groff.  This may be used  to  perform  sanity  checks  on  the
              source  text of manual pages.  warnings is a comma-separated list of warning names;
              if it is not supplied, the default is "mac".  To disable a groff warning, prefix it
              with "!": for example, --warnings=mac,!break enables warnings in the "mac" category
              and disables warnings in the "break" category.  See the  “Warnings”  node  in  info
              groff for a list of available warning names.

   Main modes of operation
       -f, --whatis
              Approximately  equivalent  to  whatis.  Display a short description from the manual
              page, if available.  See whatis(1) for details.

       -k, --apropos
              Approximately equivalent to apropos.  Search the short manual page descriptions for
              keywords and display any matches.  See apropos(1) for details.

       -K, --global-apropos
              Search  for  text in all manual pages.  This is a brute-force search, and is likely
              to take some time; if you can, you should specify a section to reduce the number of
              pages  that need to be searched.  Search terms may be simple strings (the default),
              or regular expressions if the --regex option is used.

              Note that this searches the sources of the manual pages, not the rendered text, and
              so  may  include  false  positives  due to things like comments in source files, or
              false negatives due to things like hyphens being written as "\-" in  source  files.
              Searching the rendered text would be much slower.

       -l, --local-file
              Activate  "local" mode.  Format and display local manual files instead of searching
              through the  system's  manual  collection.   Each  manual  page  argument  will  be
              interpreted  as  an  nroff  source  file  in  the  correct  format.  No cat file is
              produced.  If '-' is listed as one of the  arguments,  input  will  be  taken  from
              stdin.

              If  this  option  is  not used, then man will also fall back to interpreting manual
              page arguments as local file names if the argument contains a "/" character,  since
              that is a good indication that the argument refers to a path on the file system.

       -w, --where, --path, --location
              Don't  actually  display  the  manual page, but do print the location of the source
              nroff file that would be formatted.  If the -a option is also used, then print  the
              locations of all source files that match the search criteria.

       -W, --where-cat, --location-cat
              Don't  actually  display  the  manual  page,  but  do  print  the  location  of the
              preformatted cat file that would be displayed.  If the -a option is also used, then
              print the locations of all preformatted cat files that match the search criteria.

              If -w and -W are both used, then print both source file and cat file separated by a
              space.  If all of -w, -W, and -a are used, then do this for each possible match.

       -c, --catman
              This option is not for general use and should only be used by the catman program.

       -R encoding, --recode=encoding
              Instead of formatting the manual page in the usual way, output its source converted
              to  the  specified  encoding.  If you already know the encoding of the source file,
              you can also use manconv(1) directly.  However, this option allows you  to  convert
              several  manual  pages  to a single encoding without having to explicitly state the
              encoding of each, provided that they were already installed in a structure  similar
              to a manual page hierarchy.

              Consider using man-recode(1) instead for converting multiple manual pages, since it
              has an interface designed for bulk conversion and so can be much faster.

   Finding manual pages
       -L locale, --locale=locale
              man will normally determine your current  locale  by  a  call  to  the  C  function
              setlocale(3)  which  interrogates various environment variables, possibly including
              $LC_MESSAGES and $LANG.  To temporarily override the  determined  value,  use  this
              option  to  supply  a  locale  string  directly to man.  Note that it will not take
              effect until the search for pages actually begins.  Output such as the help message
              will always be displayed in the initially determined locale.

       -m system[,...], --systems=system[,...]
              If  this  system  has  access to other operating systems' manual pages, they can be
              accessed using this option.  To search for a manual page from NewOS's  manual  page
              collection, use the option -m NewOS.

              The  system  specified  can  be  a  combination of comma delimited operating system
              names.  To include a search of the native operating system's manual pages,  include
              the  system name man in the argument string.  This option will override the $SYSTEM
              environment variable.

       -M path, --manpath=path
              Specify an alternate manpath to use.  By default, man uses manpath derived code  to
              determine  the  path  to  search.   This  option overrides the $MANPATH environment
              variable and causes option -m to be ignored.

              A path specified as a  manpath  must  be  the  root  of  a  manual  page  hierarchy
              structured  into sections as described in the man-db manual (under "The manual page
              system").  To view manual pages outside such hierarchies, see the -l option.

       -S list, -s list, --sections=list
              The given list is a colon- or comma-separated list of sections, used  to  determine
              which  manual  sections  to  search  and  in what order.  This option overrides the
              $MANSECT environment variable.  (The -s spelling is for compatibility  with  System
              V.)

       -e sub-extension, --extension=sub-extension
              Some  systems  incorporate  large  packages  of  manual  pages,  such as those that
              accompany the Tcl package, into the main manual page hierarchy.  To get around  the
              problem  of  having  two  manual  pages with the same name such as exit(3), the Tcl
              pages were usually all assigned to section l.  As this is unfortunate,  it  is  now
              possible  to  put  the  pages  in  the  correct  section,  and to assign a specific
              "extension" to them, in this case, exit(3tcl).  Under normal  operation,  man  will
              display  exit(3)  in  preference to exit(3tcl).  To negotiate this situation and to
              avoid having to know which section the page you  require  resides  in,  it  is  now
              possible  to give man a sub-extension string indicating which package the page must
              belong to.  Using the above example,  supplying  the  option  -e tcl  to  man  will
              restrict the search to pages having an extension of *tcl.

       -i, --ignore-case
              Ignore case when searching for manual pages.  This is the default.

       -I, --match-case
              Search for manual pages case-sensitively.

       --regex
              Show  all  pages with any part of either their names or their descriptions matching
              each page argument as a regular expression, as with  apropos(1).   Since  there  is
              usually  no  reasonable  way  to  pick  a  "best" page when searching for a regular
              expression, this option implies -a.

       --wildcard
              Show all pages with any part of either their names or their  descriptions  matching
              each page argument using shell-style wildcards, as with apropos(1) --wildcard.  The
              page argument must  match  the  entire  name  or  description,  or  match  on  word
              boundaries  in the description.  Since there is usually no reasonable way to pick a
              "best" page when searching for a wildcard, this option implies -a.

       --names-only
              If the --regex or --wildcard option is  used,  match  only  page  names,  not  page
              descriptions, as with whatis(1).  Otherwise, no effect.

       -a, --all
              By  default, man will exit after displaying the most suitable manual page it finds.
              Using this option forces man to display all the manual pages with names that  match
              the search criteria.

       -u, --update
              This  option  causes  man  to update its database caches of installed manual pages.
              This is only needed in rare situations, and it is normally better to  run  mandb(8)
              instead.

       --no-subpages
              By  default,  man  will  try  to  interpret pairs of manual page names given on the
              command line as equivalent to a single manual page name containing a hyphen  or  an
              underscore.   This  supports the common pattern of programs that implement a number
              of subcommands, allowing them to provide manual pages for each that can be accessed
              using  similar  syntax  as would be used to invoke the subcommands themselves.  For
              example:

                $ man -aw git diff
                /usr/share/man/man1/git-diff.1.gz

              To disable this behaviour, use the --no-subpages option.

                $ man -aw --no-subpages git diff
                /usr/share/man/man1/git.1.gz
                /usr/share/man/man3/Git.3pm.gz
                /usr/share/man/man1/diff.1.gz

   Controlling formatted output
       -P pager, --pager=pager
              Specify which output pager to use.  By default, man uses pager, falling back to cat
              if  pager  is  not found or is not executable.  This option overrides the $MANPAGER
              environment variable, which in turn overrides the $PAGER environment variable.   It
              is not used in conjunction with -f or -k.

              The  value  may  be  a simple command name or a command with arguments, and may use
              shell quoting (backslashes, single quotes, or double quotes).  It may not use pipes
              to  connect  multiple  commands;  if you need that, use a wrapper script, which may
              take the file to display either as an argument or on standard input.

       -r prompt, --prompt=prompt
              If a recent version of less is used as the pager,  man  will  attempt  to  set  its
              prompt and some sensible options.  The default prompt looks like

               Manual page name(sec) line x

              where name denotes the manual page name, sec denotes the section it was found under
              and x the current line number.  This is achieved by  using  the  $LESS  environment
              variable.

              Supplying  -r with a string will override this default.  The string may contain the
              text $MAN_PN which will be expanded to the name of the current manual page and  its
              section  name  surrounded  by  "(" and ")".  The string used to produce the default
              could be expressed as

              \ Manual\ page\ \$MAN_PN\ ?ltline\ %lt?L/%L.:
              byte\ %bB?s/%s..?\ (END):?pB\ %pB\\%..
              (press h for help or q to quit)

              It is broken into three lines here for the  sake  of  readability  only.   For  its
              meaning  see  the less(1) manual page.  The prompt string is first evaluated by the
              shell.  All double quotes, back-quotes  and  backslashes  in  the  prompt  must  be
              escaped  by a preceding backslash.  The prompt string may end in an escaped $ which
              may be followed by further options for less.  By default man sets the -ix8 options.

              The $MANLESS environment variable described below may be  used  to  set  a  default
              prompt string if none is supplied on the command line.

       -7, --ascii
              When  viewing a pure ascii(7) manual page on a 7 bit terminal or terminal emulator,
              some  characters  may  not  display  correctly  when  using  the  latin1(7)  device
              description  with  GNU  nroff.   This  option  allows pure ascii manual pages to be
              displayed in ascii with the latin1 device.  It will not translate any latin1  text.
              The  following table shows the translations performed: some parts of it may only be
              displayed properly when using GNU nroff's latin1(7) device.

              Description           Octal   latin1   ascii
              ─────────────────────────────────────────────
              continuation hyphen    255      ‐        -
              bullet (middle dot)    267      •        o

              acute accent           264      ´        '
              multiplication sign    327      ×        x

              If the latin1 column displays correctly, your terminal may be  set  up  for  latin1
              characters  and  this option is not necessary.  If the latin1 and ascii columns are
              identical, you are reading this page using this option or man did not  format  this
              page  using  the  latin1  device  description.   If the latin1 column is missing or
              corrupt, you may need to view manual pages with this option.

              This option is ignored when using options -t, -H, -T, or -Z and may be useless  for
              nroff other than GNU's.

       -E encoding, --encoding=encoding
              Generate  output  for  a  character  encoding other than the default.  For backward
              compatibility, encoding may be an nroff device such as ascii, latin1,  or  utf8  as
              well as a true character encoding such as UTF-8.

       --no-hyphenation, --nh
              Normally, nroff will automatically hyphenate text at line breaks even in words that
              do not contain hyphens, if it is necessary to do so to lay  out  words  on  a  line
              without  excessive  spacing.   This option disables automatic hyphenation, so words
              will only be hyphenated if they already contain hyphens.

              If you are writing a manual page and simply want to prevent nroff from  hyphenating
              a  word  at  an  inappropriate point, do not use this option, but consult the nroff
              documentation instead; for instance, you can put "\%" inside  a  word  to  indicate
              that  it  may  be  hyphenated  at that point, or put "\%" at the start of a word to
              prevent it from being hyphenated.

       --no-justification, --nj
              Normally, nroff will automatically justify  text  to  both  margins.   This  option
              disables  full  justification, leaving justified only to the left margin, sometimes
              called "ragged-right" text.

              If you are writing a manual page and simply want to prevent nroff  from  justifying
              certain  paragraphs,  do  not  use this option, but consult the nroff documentation
              instead; for instance, you can use the ".na", ".nf", ".fi", and ".ad"  requests  to
              temporarily disable adjusting and filling.

       -p string, --preprocessor=string
              Specify  the sequence of preprocessors to run before nroff or troff/groff.  Not all
              installations will have a full set of preprocessors.  Some of the preprocessors and
              the letters used to designate them are: eqn (e), grap (g), pic (p), tbl (t), vgrind
              (v), refer (r).   This  option  overrides  the  $MANROFFSEQ  environment  variable.
              zsoelim is always run as the very first preprocessor.

       -t, --troff
              Use groff -mandoc to format the manual page to stdout.  This option is not required
              in conjunction with -H, -T, or -Z.

       -T[device], --troff-device[=device]
              This option is used to change groff (or possibly troff's) output to be suitable for
              a  device  other  than  the  default.   It  implies  -t.   Examples  (provided with
              Groff-1.17) include dvi, latin1, ps, utf8, X75 and X100.

       -H[browser], --html[=browser]
              This option will cause groff to produce HTML output, and will display  that  output
              in  a  web  browser.   The  choice of browser is determined by the optional browser
              argument if one is provided, by the $BROWSER environment variable, or by a compile-
              time  default  if  that  is unset (usually lynx).  This option implies -t, and will
              only work with GNU troff.

       -X[dpi], --gxditview[=dpi]
              This option displays the output of groff in a graphical window using the  gxditview
              program.   The  dpi (dots per inch) may be 75, 75-12, 100, or 100-12, defaulting to
              75; the -12 variants use a 12-point base font.  This option  implies  -T  with  the
              X75, X75-12, X100, or X100-12 device respectively.

       -Z, --ditroff
              groff  will  run troff and then use an appropriate post-processor to produce output
              suitable for the chosen device.  If groff -mandoc is groff, this option  is  passed
              to groff and will suppress the use of a post-processor.  It implies -t.

   Getting help
       -?, --help
              Print a help message and exit.

       --usage
              Print a short usage message and exit.

       -V, --version
              Display version information.

EXIT STATUS

       0      Successful program execution.

       1      Usage, syntax or configuration file error.

       2      Operational error.

       3      A child process returned a non-zero exit status.

       16     At least one of the pages/files/keywords didn't exist or wasn't matched.

ENVIRONMENT

       MANPATH
              If $MANPATH is set, its value is used as the path to search for manual pages.

              See  the SEARCH PATH section of manpath(5) for the default behaviour and details of
              how this environment variable is handled.

       MANROFFOPT
              Every time man invokes the formatter (nroff, troff, or groff), it adds the contents
              of $MANROFFOPT to the formatter's command line.

       MANROFFSEQ
              If  $MANROFFSEQ  is set, its value is used to determine the set of preprocessors to
              pass each manual page through.  The default preprocessor list is system dependent.

       MANSECT
              If $MANSECT is set, its value is a colon-delimited list of sections and it is  used
              to  determine which manual sections to search and in what order.  The default is "1
              n l 8 3 0 2 3type 3posix 3pm 3perl 3am 5 4 9 6 7", unless overridden by the SECTION
              directive in /etc/manpath.config.

       MANPAGER, PAGER
              If  $MANPAGER or $PAGER is set ($MANPAGER is used in preference), its value is used
              as the name of the program used to display the manual page.  By default,  pager  is
              used, falling back to cat if pager is not found or is not executable.

              The  value  may  be  a simple command name or a command with arguments, and may use
              shell quoting (backslashes, single quotes, or double quotes).  It may not use pipes
              to  connect  multiple  commands;  if you need that, use a wrapper script, which may
              take the file to display either as an argument or on standard input.

       MANLESS
              If $MANLESS is set, its value will be used as the default  prompt  string  for  the
              less pager, as if it had been passed using the -r option (so any occurrences of the
              text $MAN_PN will be expanded in the same way).  For example, if you  want  to  set
              the   prompt  string  unconditionally  to  “my  prompt  string”,  set  $MANLESS  to
              ‘-Psmy prompt string’.  Using the -r option overrides this environment variable.

       BROWSER
              If $BROWSER is set, its value is a colon-delimited list of commands, each of  which
              in  turn is used to try to start a web browser for man --html.  In each command, %s
              is replaced by a filename containing the HTML output from groff, %% is replaced  by
              a single percent sign (%), and %c is replaced by a colon (:).

       SYSTEM If  $SYSTEM is set, it will have the same effect as if it had been specified as the
              argument to the -m option.

       MANOPT If $MANOPT is set, it will be parsed prior to man's command line and is expected to
              be in a similar format.  As all of the other man specific environment variables can
              be expressed as command line options, and are thus candidates for being included in
              $MANOPT  it  is  expected  that  they  will become obsolete.  N.B.  All spaces that
              should be interpreted as part of an option's argument must be escaped.

       MANWIDTH
              If $MANWIDTH is set, its value is used as the line length for  which  manual  pages
              should  be formatted.  If it is not set, manual pages will be formatted with a line
              length appropriate to the current  terminal  (using  the  value  of  $COLUMNS,  and
              ioctl(2)  if  available, or falling back to 80 characters if neither is available).
              Cat pages will only be saved when the default formatting can be used, that is  when
              the terminal line length is between 66 and 80 characters.

       MAN_KEEP_FORMATTING
              Normally,  when  output is not being directed to a terminal (such as to a file or a
              pipe), formatting characters are discarded to make it easier  to  read  the  result
              without  special  tools.   However, if $MAN_KEEP_FORMATTING is set to any non-empty
              value, these formatting characters are retained.  This may be useful  for  wrappers
              around man that can interpret formatting characters.

       MAN_KEEP_STDERR
              Normally,  when  output  is  being directed to a terminal (usually to a pager), any
              error output from the command used to produce formatted versions of manual pages is
              discarded  to  avoid  interfering with the pager's display.  Programs such as groff
              often produce relatively minor error messages about typographical problems such  as
              poor  alignment,  which  are unsightly and generally confusing when displayed along
              with the manual page.  However,  some  users  want  to  see  them  anyway,  so,  if
              $MAN_KEEP_STDERR  is  set to any non-empty value, error output will be displayed as
              usual.

       MAN_DISABLE_SECCOMP
              On Linux, man normally confines subprocesses that handle  untrusted  data  using  a
              seccomp(2) sandbox.  This makes it safer to run complex parsing code over arbitrary
              manual pages.  If this goes wrong for some reason unrelated to the content  of  the
              page  being  displayed,  you can set $MAN_DISABLE_SECCOMP to any non-empty value to
              disable the sandbox.

       PIPELINE_DEBUG
              If the $PIPELINE_DEBUG environment variable is set to  "1",  then  man  will  print
              debugging messages to standard error describing each subprocess it runs.

       LANG, LC_MESSAGES
              Depending  on  system  and implementation, either or both of $LANG and $LC_MESSAGES
              will be interrogated for the current message locale.  man will display its messages
              in that locale (if available).  See setlocale(3) for precise details.

FILES

       /etc/manpath.config
              man-db configuration file.

       /usr/share/man
              A global manual page hierarchy.

STANDARDS

       POSIX.1-2001, POSIX.1-2008, POSIX.1-2017.

SEE ALSO

       apropos(1),  groff(1),  less(1),  manpath(1),  nroff(1),  troff(1), whatis(1), zsoelim(1),
       manpath(5), man(7), catman(8), mandb(8)

       Documentation for some packages may be available in other  formats,  such  as  info(1)  or
       HTML.

HISTORY

       1990, 1991 – Originally written by John W. Eaton (jwe@che.utexas.edu).

       Dec  23  1992:  Rik  Faith (faith@cs.unc.edu) applied bug fixes supplied by Willem Kasdorp
       (wkasdo@nikhefk.nikef.nl).

       30th  April  1994  –  23rd  February  2000:  Wilf.  (G.Wilford@ee.surrey.ac.uk)  has  been
       developing and maintaining this package with the help of a few dedicated people.

       30th October 1996 – 30th March 2001: Fabrizio Polacco <fpolacco@debian.org> maintained and
       enhanced this package for the Debian project, with the help of all the community.

       31st March 2001 – present day: Colin Watson <cjwatson@debian.org> is  now  developing  and
       maintaining man-db.

BUGS

       https://gitlab.com/man-db/man-db/-/issues
       https://savannah.nongnu.org/bugs/?group=man-db