TAC(1) User Commands TAC(1)

NAME
       tac - concatenate and print files in reverse

SYNOPSIS
       tac [OPTION]... [FILE]...

DESCRIPTION
       Write  each FILE to standard output, last line first.  With no FILE, or
       when FILE is -, read standard input.

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

       -b, before
              attach the separator before instead of after

       -r, regex
              interpret the separator as a regular expression

       -s, separator=STRING
              use STRING as the separator instead of newline

       help display this help and exit

       version
              output version information and exit

       GNU  coreutils  online  help:  
       Report tac translation bugs to 

AUTHOR
       Written by Jay Lepreau and David MacKenzie.

COPYRIGHT
       Copyright © 2013 Free Software Foundation, Inc.   License  GPLv3+:  GNU
       GPL version 3 or later .
       This  is  free  software:  you  are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       rev(1)

       The full documentation for tac is maintained as a Texinfo  manual.   If
       the info and tac programs are properly installed at your site, the com‐
       mand

              info coreutils 'tac invocation'

       should give you access to the complete manual.



GNU coreutils 8.22               October 2018                           TAC(1)