linux 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 (enables -a)

       --help display this help and exit

       --version
	      output version information and exit

AUTHOR
       Written by David MacKenzie.

REPORTING BUGS
       Report unexpand bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report unexpand translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright (C) 2010 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)

       The  full  documentation  for unexpand is maintained as a Texinfo manual.  If the info and unexpand programs are properly installed at your
       site, the command

	      info coreutils 'unexpand invocation'

       should give you access to the complete manual.

GNU coreutils 8.5						   February 2011						       UNEXPAND(1)