x11r4 man page for unexpand

UNEXPAND(1)                                                        User Commands                                                       UNEXPAND(1)

NAME
       unexpand - convert spaces to tabs

SYNOPSIS
       unexpand [OPTION]... [FILE]...

DESCRIPTION
       Convert blanks in each FILE to tabs, writing to standard output.

       With no FILE, or when FILE is -, read standard input.

       Mandatory arguments to long options are mandatory for short options too.

       -a, --all
              convert all blanks, instead of just initial blanks

       --first-only
              convert only leading sequences of blanks (overrides -a)

       -t, --tabs=N
              have tabs N characters apart instead of 8 (enables -a)

       -t, --tabs=LIST
              use  comma  separated  list of tab positions The last specified position can be prefixed with '/' to specify a tab size to use after
              the last explicitly specified tab stop.  Also a prefix of '+' can be used to align remaining tab stops relative to the  last  speci-
              fied tab stop instead of the first column

       --help display this help and exit

       --version
              output version information and exit

AUTHOR
       Written by David MacKenzie.

REPORTING BUGS
       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report unexpand translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright (C) 2017 Free Software Foundation, Inc.  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.

SEE ALSO
       expand(1)

       Full documentation at: <http://www.gnu.org/software/coreutils/unexpand>
       or available locally via: info '(coreutils) unexpand invocation'

GNU coreutils 8.28                                                 January 2018                                                        UNEXPAND(1)