Provided by: buku_4.8+ds-1_all bug

NAME

       buku - Bookmark manager like a text-based mini-web

SYNOPSIS

       buku [OPTIONS] [KEYWORD [KEYWORD ...]]

DESCRIPTION

       buku is a command-line utility to store, tag, search and organize bookmarks.

       Features

         * Store bookmarks with auto-fetched title, tags and description
         * Auto-import from Firefox, Google Chrome, Chromium, Vivaldi, and MS Edge
         * Open bookmarks and search results in browser
         * Shorten, expand URLs
         * Browse cached page from the Wayback Machine
         * Text editor integration
         * Lightweight, clean interface, custom colors
         * Powerful search options (regex, substring...)
         * Continuous search with on the fly mode switch
         * Portable, merge-able database to sync between systems
         * Import/export bookmarks from/to HTML, XBEL, Markdown or Orgfile
         * Smart tag management using redirection (>>, >, <<)
         * Multithreaded full DB refresh
         * Manual encryption support
         * Shell completion scripts, man page with handy examples

OPERATIONAL NOTES

       1.  The database file is stored in:
             -  $XDG_DATA_HOME/buku/bookmarks.db, if XDG_DATA_HOME is defined (first preference),
           or
             - $HOME/.local/share/buku/bookmarks.db, if HOME is defined (second preference), or
             - %APPDATA%\buku\bookmarks.db, if you are on Windows, or
             - the current directory.

       2.  If the URL contains characters like ';', '&'  or  brackets  they  may  be  interpreted
           specially by the shell. To avoid it, add the URL within single or double quotes ('/").

       3.  URLs are unique in DB. The same URL cannot be added twice.

       4.  Bookmarks with immutable titles are listed with '(L)' after the title.

       5.  Tags:
             - Comma (',') is the tag delimiter in DB. A tag cannot have comma(s) in it. Tags are
           filtered (for unique tags) and sorted. Tags are  stored  in  lower  case  and  can  be
           replaced, appended or deleted.
             -  Page keywords having a word to comma ratio > 3 are appended to description rather
           than tags.
             - Parent folder (and subfolder) names are converted  to  all-lowercase  tags  during
           bookmarks HTML import.
             - Releases prior to v2.7 support both capital and lower cases in tags. From v2.7 all
           tags are stored in lowercase. An undocumented option --fixtags is introduced to modify
           the  older tags. It also fixes another issue where the same tag appears multiple times
           in the tagset of a record. Run buku --fixtags once.
             - Tags can  be  edited  from  the  prompt  very  easily  using  '>>'  (append),  '>'
           (overwrite) and '<<' (remove) symbols. The LHS of the operands denotes the indices and
           ranges of tags to apply (as listed by --tag or key 't' at prompt) and the RHS  denotes
           the actual DB indices and ranges of the bookmarks to apply the change to.

       6.  Update operation:
             - If --title, --tag or --comment is passed without argument, clear the corresponding
           field from DB.
             - If --url is passed (and --title is omitted), update the title from web  using  the
           URL. Description is updated (if --comment is omitted). Tags remain untouched.
             -  If indices are passed without any other options (--url, --title, --tag, --comment
           and --immutable), read the URLs from DB and update titles, description and append tags
           from web. Bookmarks marked immutable are skipped.
             -  Can  update  bookmarks  matching  a  search, when combined with any of the search
           options and no arguments to update are passed.

       7.  Delete operation:
             - When a record is deleted, the last record is moved to the index.
             - Delete doesn't work with range and indices provided together as arguments. It's an
           intentional  decision  to avoid extra sorting, in-range checks and to keep the auto-DB
           compaction functionality intact. On the same lines, indices are deleted in  descending
           order.
             -  Can  delete  bookmarks  matching  a  search, when combined with any of the search
           options and no arguments to delete are passed.

       8.  Search works in mysterious ways:
             - Case-insensitive.
             - Matches words in URL, title and tags.
             - --sany : match any of the keywords in URL, title or tags. Default search option.
             - --sall : match all the keywords in URL, title or tags.
             - --deep : match substrings (`match` matches `rematched`) in URL, title and tags.
             - --sreg : match a regular expression (ignores --deep).
             - --stag : search bookmarks by tags, or list  all  tags  alphabetically  with  usage
           count  (if no arguments). Delimit the list of tags in the query with `,` to search for
           bookmarks that match ANY of the listed tags. Delimit  tags  with  `+`  to  search  for
           bookmarks  that  match  ALL  of  the listed tags. Note that `,` and `+` cannot be used
           together in the same search. Exclude bookmarks matching certain tags from the  results
           by  using  `  -  `  followed  by  the tags. Note that the ` - ` operator and the ` + `
           delimiter must be space separated: ` - ` instead of `-` and ` + ` instead of `+`. This
           is to distinguish them from hyphenated tags (e.g., `some-tag-name`) and tags with '+'s
           (e.g., `some+tag+name`).
             - Search for keywords along with tag filtering is possible. Two searches are  issued
           (one for keywords and another for tags) and the intersection of the 2 sets is returned
           as the resultset.
             - Search results are indexed incrementally. This  index  is  different  from  actual
           database index of a bookmark record which is shown within '[]' after the title.
             -  Results  for  any  keyword matches are ordered by the number of keyword matches -
           results matching more keywords (match score) will appear earlier in the list.  Results
           having the same number of matches will be ranked by their record DB index. If only one
           keyword is searched, results will be ordered by DB index, since all  matching  records
           will have the same match score.

       9.  Import:
             - Auto-import looks in the default installation path and default user profile.
             - URLs starting with `place:`, `file://` and `apt:` are ignored during import.
             -  Parent folder (and subfolder) names are automatically imported as tags if --tacit
           is used.
             - Tags are merged even if bookmark URL exists when --tacit is used.
             - JSON files exported from browser can be imported. Export to JSON is not supported.

       10. Encryption is optional and manual. AES256 algorithm is used. To  use  encryption,  the
           database  file  should  be unlocked (-k) before using buku and locked (-l) afterwards.
           Between these 2 operations, the database file lies unencrypted on the disk, and NOT in
           memory. Also, note that the database file is unencrypted on creation.

       11. Editor support:
             -  A  single  bookmark  can be edited before adding. The editor can be set using the
           environment variable *EDITOR* or by explicitly specifying the editor. The latter takes
           precedence.  If  -a  is  used  along  with -w, the details are populated in the editor
           template.
             - In case of edit and update (a single bookmark), the existing  record  details  are
           fetched  from DB and populated in the editor template. The environment variable EDITOR
           must be set. Note that -u works independently of -w.
             - All lines beginning with "#" will be stripped. Then line 1 will be treated as  the
           URL,  line  2  will be the title, line 3 will be comma separated tags, and the rest of
           the lines will be parsed as descriptions.

       12. Proxy support: please refer to the ENVIRONMENT section.

       13. Alternative DB file:
             - The option --db (to specify an alternative database file  location)  is  app-only.
           Manual usage is prone to issues arising from human error.
             -  Note  that this option is useful if you want to store the db file in cloud synced
           location. Another mechanism could be to have the db file synced and create  a  symlink
           to it at the default location.

GENERAL OPTIONS

       -a --add URL [tag, ...]
              Bookmark URL along with comma-separated tags. A tag can have multiple words.

       -u --update [...]
              Update  fields  of  the  bookmarks  at specified indices in DB. If no arguments are
              specified, all titles and descriptions are refreshed  from  the  web.  Tags  remain
              untouched.  Works with update modifiers for the fields url, title, tag and comment.
              If only indices are passed without any edit options, titles  and  descriptions  are
              fetched  and  updated (if not empty). Accepts hyphenated ranges and space-separated
              indices. Updates search results when used with search options, if no arguments.

       -w --write [editor|index]
              Edit a bookmark in editor  before  adding  it.  To  edit  and  update  an  existing
              bookmark,  the index should be passed. In this case the environment variable EDITOR
              must be set. The last record is opened in EDITOR if index=-1.

       -d --delete [...]
              Delete bookmarks. Accepts space-separated list of indices (e.g. 5 6 23 4 110 45) or
              a  single  hyphenated  range  (e.g.  100-200).  Note that range and list don't work
              together.  Deletes  search  results  when  combined  with  search  options,  if  no
              arguments.

       -v --version
              Show program version and exit.

       -h --help
              Show program help and exit.

EDIT OPTIONS

       --url [...]
              Specify  the URL, works with --update only. Fetches and updates title if --title is
              not used.

       --tag [+|-] [...]
              Specify comma separated tags, works with --add, --update. Clears the  tags,  if  no
              arguments  passed.  Appends  or deletes tags, if list of tags is preceded by '+' or
              '-' respectively.

       --title [...]
              Manually specify the title, works with --add, --update. Omits or clears the  title,
              if no arguments passed.

       -c --comment [...]
              Add  notes  or  description of the bookmark, works with --add, --update. Clears the
              comment, if no arguments passed.

       --immutable N
              Set the title, description and tags of a  bookmark  immutable  during  autorefresh.
              Works  with  --add,  --update.  N=1  sets  the  immutable  flag, N=0 removes it. If
              omitted, bookmarks are added with N=0.

SEARCH OPTIONS

       -s --sany keyword [...]
              Search bookmarks with ANY of the keyword(s) in URL, title  or  tags  and  show  the
              results.  Prompts  to  enter  result  number  to  open  in  browser.  Note that the
              sequential result index is not the DB index. The DB  index  is  shown  within  '[]'
              after the title.
              This  is  the  default  search  option  for positional arguments if no other search
              option is specified.

       -S --sall keyword [...]
              Search bookmarks with ALL keywords in URL, title or  tags  and  show  the  results.
              Behaviour same as --sany.
              Special keywords:
              "blank": list entries with empty title/tag
              "immutable": list entries with locked title
              NOTE: To search the keywords, use --sany

       --deep Search modifier to match substrings. Works with --sany, --sall.

       -r --sreg expression
              Scan for a regular expression match.

       -t --stag [tag [,|+] ...] [- tag, ...]
              Search bookmarks by tags.
              Use ',' delimiter to find entries matching ANY of the tags
              Use  ' + ' delimiter to find entries matching ALL of the tags. (Note that the ' + '
              delimiter must be space separated)
              NOTE: Cannot combine ',' and '+' in the same search
              Use ' - ' to exclude bookmarks that match the tags that follow. (Note that the  '-'
              operator must be space separated).
              List all tags alphabetically, if no arguments. The usage count (number of bookmarks
              having the tag) is shown within first brackets.

       -x --exclude keyword [...]
              Exclude bookmarks matching the  specified  keywords.  Works  with  --sany,  --sall,
              --sreg and --stag.

ENCRYPTION OPTIONS

       -l --lock [N]
              Encrypt (lock) the DB file with N (> 0, default 8) hash passes to generate key.

       -k --unlock [N]
              Decrypt (unlock) the DB file with N (> 0, default 8) hash passes to generate key.

POWER OPTIONS

       --ai   Auto-import  bookmarks  from  Firefox,  Google  Chrome, Chromium, Vivaldi, and Edge
              browsers.

       -e --export file
              Export bookmarks to  Firefox  bookmarks  formatted  HTML.  Works  with  all  search
              options.
              XBEL is used if file has extension '.xbel'.
              Markdown  is  used  if  file  has extension '.md'. Markdown format: [title](url), 1
              entry per line.
              Orgfile is used if file has extension '.org' Orgfile format:  *  [[url][title]],  1
              entry per line.
              A buku database is generated if file has extension '.db'.

       -i --import file
              Import  bookmarks  from  Firefox  bookmarks  formatted  HTML.   file  is considered
              Firefox-exported JSON if it has '.json' extension, XBEL if it is '.xbel',  Markdown
              (compliant with --export format) if it is '.md', Orgfile if the extension is '.org'
              or another buku database if the extension is '.db'.

       -p --print [...]
              Show details (DB index, URL, title, tags and comment)  of  bookmark  record  by  DB
              index.  If  no  arguments, all records with actual index from DB are shown. Accepts
              hyphenated ranges and space-separated indices. A  negative  value  (introduced  for
              convenience)  behaves like the tail utility, e.g., -n shows the details of the last
              n bookmarks.

       -f --format N
              Show selective monochrome output with specific fields. Works with  --print.  Search
              results  honour  the  option when used along with --json. Useful for creating batch
              scripts.
              N = 1, show only URL.
              N = 2, show URL and tags in a single line.
              N = 3, show only title.
              N = 4, show URL, title and tags in a single line.
              N = 5, show title and tags in a single line.
              To omit DB index from printed results, use N0, e.g., 10, 20, 30, 40, 50.

       -j --json
              Output data formatted as JSON, works with --print output and search results.

       --colors COLORS
              Set output colors. Refer to the COLORS section below for details.

       --nc   Disable color output in all messages. Useful on terminals which can't  handle  ANSI
              color codes or scripted environments.

       -n --count N
              Number of results to show per page (default 10).

       --np   Do not show the prompt, run and exit.

       -o --open [...]
              Open  bookmarks by DB indices or ranges in browser. Open a random index if argument
              is omitted.

       --oa   Open all search results immediately in the browser. Works best with --np. When used
              along  with  --update  or  --delete,  URLs are opened in the browser first and then
              modified or deleted.

       --replace old new
              Replace old tag with new tag if both are passed; delete old tag if new tag  is  not
              specified.

       --shorten index|URL
              Shorten  the  URL  at DB index or an independent URL using the tny.im URL shortener
              service.

       --expand index|URL
              Expand the URL at DB index or an independent URL shortened using tny.im.

       --cached index|URL
              Browse the latest cached version of the URL at DB index or an independent URL using
              the Wayback Machine. Useful for viewing the content of bookmarks which are not live
              any more.

       --suggest
              Show a list of similar tags to choose from when adding a new bookmark.

       --tacit
              Show lesser output. Reduces the verbosity of certain operations  like  add,  update
              etc.

       --nostdin
              Do  not  attempt  to  read  data  from  standard input e.g. when the program is not
              executed from a tty.

       --threads
              Maximum number of parallel  network  connection  threads  to  use  during  full  DB
              refresh. By default 4 connections are spawned.  N can range from 1 to 10.

       -V     Check the latest upstream version available. This is FYI. It is possible the latest
              upstream released version is still not available in your  package  manager  as  the
              process takes a while.

       -g --debug
              Show debug information and additional logs.

PROMPT KEYS

       1-N    Browse search results by indices and ranges.

       O [id|range [...]]
              Try  to  open  search  results  or  indices (when not in a search context) in a GUI
              browser. Toggle try to open urls in a GUI based browser (even if BROWSER is set) if
              no arguments. Toggling is useful when trying to open bookmarks by DB index.

       a      Open all search results in browser.

       s keyword [...]
              Search for records with ANY keyword.

       S keyword [...]
              Search for records with ALL keywords.

       d      Toggle deep search to match substrings ('pen' matches 'opened').

       r expression
              Run a regular expression search.

       t [...]
              Search bookmarks by a tag. List all tags alphabetically, if no arguments.

       g taglist id|range [...] [>>|>|<<] [record id|range ...]
              Append,  set,  remove  specific  or  all  tags by indices and/or ranges to bookmark
              indices and/or ranges (see  EXAMPLES  section  below).  Search  by  space-separated
              taglist id(s) and/or range if records are omitted.

       o id|range [...]
              Browse bookmarks by indices and/or ranges.

       p id|range [...]
              Print bookmarks by indices and/or ranges.

       w [editor|id]
              Edit and add or update a bookmark.

       c id   Copy url at search result index to clipboard.

       ?      Show help on prompt keys.

       q, ^D, double Enter
              Exit buku.

ENVIRONMENT

       Completion scripts
              Shell completion scripts for Bash, Fish and Zsh can be found in:
              https://github.com/jarun/buku/blob/master/auto-completion

       BROWSER
              Overrides the default browser. Refer to:
              http://docs.python.org/library/webbrowser.html

       EDITOR If defined, will be used as the editor to edit bookmarks with option --write.

       https_proxy
              If  defined, will be used to access http and https resources through the configured
              proxy. Supported format:
              http[s]://[username:password@]proxyhost:proxyport/

       GUI integration
              buku can be integrated in a GUI environment with simple tweaks. Please refer to:
              https://github.com/jarun/buku/wiki/System-integration

COLORS

       buku allows you to customize the color scheme via a five-letter string, reminiscent of BSD
       LSCOLORS. The five letters represent the colors of

       - index
       - title
       - URL
       - description/comment/note
       - tag

       respectively.  The five-letter string is passed is as the argument to the --colors option,
       or as the value of the environment variable BUKU_COLORS.

       We offer the following colors/styles:

         ┌───────┬───────────────────────────────────────────────────┐
         │Letter │ Color/Style                                       │
         ├───────├───────────────────────────────────────────────────┤
         │a      │ black                                             │
         │b      │ red                                               │
         │c      │ green                                             │
         │d      │ yellow                                            │
         │e      │ blue                                              │
         │f      │ magenta                                           │
         │g      │ cyan                                              │
         │h      │ white                                             │
         │i      │ bright black                                      │
         │j      │ bright red                                        │
         │k      │ bright green                                      │
         │l      │ bright yellow                                     │
         │m      │ bright blue                                       │
         │n      │ bright magenta                                    │
         │o      │ bright cyan                                       │
         │p      │ bright white                                      │
         │A-H    │ bold version of the lowercase-letter color        │
         │I-P    │ bold version of the lowercase-letter bright color │
         │x      │ normal                                            │
         │X      │ bold                                              │
         │y      │ reverse video                                     │
         │Y      │ bold reverse video                                │
         └───────┴───────────────────────────────────────────────────┘

       The default colors string is oKlxm, which stands for

       - bright cyan index
       - bold bright green title
       - bright yellow URL
       - normal description
       - bright blue tag

       Note that

       - Bright colors (implemented as \x1b[90m - \x1b[97m) may not be available  in  all  color-
         capable terminal emulators;

       - Some terminal emulators draw bold text in bright colors instead;

       - Some  terminal  emulators only distinguish between bold and bright colors via a default-
         off switch.

       Please   consult   the    manual    of    your    terminal    emulator    as    well    as
       https://en.wikipedia.org/wiki/ANSI_escape_code for details.

EXAMPLES

       1.  Edit and add a bookmark from editor:

              buku -w
              buku -w 'gedit -w'
              buku -w 'macvim -f' -a https://ddg.gg search engine, privacy

           The  first  command  picks  editor  from  the  environment variable EDITOR. The second
           command opens gedit in blocking mode. The third command opens macvim  with  option  -f
           and the URL and tags populated in template.

       2.  Add a simple bookmark:

              buku --no-stdin -a https://github.com/

           In the output, >: url, +: comment, #: tags.

       3.  Add  a  bookmark  with tags 'search engine' and 'privacy', comment 'Search engine with
           perks', fetch page title from the web:

              buku -a https://ddg.gg search engine, privacy -c Search engine with perks

           In the output, >: url, +: comment, #: tags.

       4.  Add a bookmark with tags 'search engine' & 'privacy' and immutable custom title 'DDG':

              buku -a https://ddg.gg search engine, privacy --title 'DDG' --immutable 1

           Note that URL must precede tags.

       5.  Add a bookmark without a title (works for update too):

              buku -a https://ddg.gg search engine, privacy --title

       6.  Edit and update a bookmark from editor:

              buku -w 15012014

           This will open the existing  bookmark's  details  in  the  editor  for  modifications.
           Environment variable EDITOR must be set.

       7.  Update  existing  bookmark  at  index  15012014 with new URL, tags and comments, fetch
           title from the web:

              buku -u 15012014 --url http://ddg.gg/ --tag web search, utilities -c Private search engine

       8.  Fetch and update only title for bookmark at 15012014:

              buku -u 15012014

       9.  Update only comment for bookmark at 15012014:

              buku -u 15012014 -c this is a new comment

           Applies to --url, --title and --tag too.

       10. Export bookmarks tagged 'tag 1' or 'tag 2' to HTML, XBEL, Markdown, Orgfile or  a  new
           database:

              buku -e bookmarks.html --stag tag 1, tag 2
              buku -e bookmarks.xbel --stag tag 1, tag 2
              buku -e bookmarks.md --stag tag 1, tag 2
              buku -e bookmarks.org --stag tag 1, tag 2
              buku -e bookmarks.db --stag tag 1, tag 2

           All bookmarks are exported if search is not opted.

       11. Import bookmarks from HTML, XBEL, Markdown or Orgfile:

              buku -i bookmarks.html
              buku -i bookmarks.xbel
              buku -i bookmarks.md
              buku -i bookmarks.db

       12. Delete only comment for bookmark at 15012014:

              buku -u 15012014 -c

           Applies to --title and --tag too. URL cannot be deleted without deleting the bookmark.

       13. Update or refresh full DB with page titles from the web:

              buku -u
              buku -u --tacit (show only failures and exceptions)

           This  operation  can update the title or description fields of non-immutable bookmarks
           by parsing the fetched page. Fields are updated only if the fetched  fields  are  non-
           empty. Tags remain untouched.

       14. Delete bookmark at index 15012014:

              buku -d 15012014

           The  last  index  is moved to the deleted index to keep the DB compact. Add --tacit to
           delete without confirmation.

       15. Delete all bookmarks:

              buku -d

       16. Delete a range or list of bookmarks:

              buku -d 100-200
              buku -d 100 15 200

       17. Search bookmarks for ANY of the keywords 'kernel' and 'debugging'  in  URL,  title  or
           tags:

              buku kernel debugging
              buku -s kernel debugging

       18. Search bookmarks with ALL the keywords 'kernel' and 'debugging' in URL, title or tags:

              buku -S kernel debugging

       19. Search bookmarks tagged 'general kernel concepts':

              buku --stag general kernel concepts

       20. Search  for  bookmarks matching ANY of the tags 'kernel', 'debugging', 'general kernel
           concepts':

              buku --stag kernel, debugging, general kernel concepts

       21. Search for bookmarks matching ALL of the tags 'kernel', 'debugging',  'general  kernel
           concepts':

              buku --stag kernel + debugging + general kernel concepts

       22. Search  for  bookmarks  matching any of the keywords 'hello' or 'world', excluding the
           keywords 'real' and 'life', matching both  the  tags  'kernel'  and  'debugging',  but
           excluding the tags 'general kernel concepts' and 'books':

              buku hello world --exclude real life --stag 'kernel + debugging - general kernel concepts, books'

       23. List all unique tags alphabetically:

              buku --stag

       24. Run a search and update the results:

              buku -s kernel debugging -u --tag + linux kernel

       25. Run a search and delete the results:

              buku -s kernel debugging -d

       26. Encrypt or decrypt DB with custom number of iterations (15) to generate key:

              buku -l 15
              buku -k 15

           The  same  number  of  iterations  must  be  specified for one lock & unlock instance.
           Default is 8, if omitted.

       27. Show details of bookmarks at index 15012014 and ranges 20-30, 40-50:

              buku -p 20-30 15012014 40-50

       28. Show details of the last 10 bookmarks:

              buku -p -10

       29. Show all bookmarks with real index from database:

              buku -p
              buku -p | more

       30. Replace tag 'old tag' with 'new tag':

              buku --replace 'old tag' 'new tag'

       31. Delete tag 'old tag' from DB:

              buku --replace 'old tag'

       32. Append (or delete) tags 'tag 1', 'tag 2' to (or from) existing  tags  of  bookmark  at
           index 15012014:

              buku -u 15012014 --tag + tag 1, tag 2
              buku -u 15012014 --tag - tag 1, tag 2

       33. Open URL at index 15012014 in browser:

              buku -o 15012014

       34. List bookmarks with no title or tags for bookkeeping:

              buku -S blank

       35. List bookmarks with immutable title:

              buku -S immutable

       36. Shorten the URL www.google.com and the URL at index 20:

              buku --shorten www.google.com
              buku --shorten 20

       37. Append,  remove  tags  at  prompt  (taglist  index  to the left, bookmark index to the
           right):

              // append tags at taglist indices 4 and 6-9 to existing tags in bookmarks at indices 5 and 2-3
              buku (? for help) g 4 9-6 >> 5 3-2
              // set tags at taglist indices 4 and 6-9 as tags in bookmarks at indices 5 and 2-3
              buku (? for help) g 4 9-6 > 5 3-2
              // remove all tags from bookmarks at indices 5 and 2-3
              buku (? for help) g > 5 3-2
              // remove tags at taglist indices 4 and 6-9 from tags in bookmarks at indices 5 and 2-3
              buku (? for help) g 4 9-6 << 5 3-2

       38. List bookmarks with colored output:

              $ buku --colors oKlxm -p

AUTHOR

       Arun Prakash Jana <engineerarun@gmail.com>

HOME

       https://github.com/jarun/buku

WIKI

       https://github.com/jarun/buku/wiki

REPORTING BUGS

       https://github.com/jarun/buku/issues

LICENSE

       Copyright © 2015-2022 Arun Prakash Jana <engineerarun@gmail.com>.

       License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it. There is  NO  WARRANTY,
       to the extent permitted by law.