TAC

tac − concatenate and print files in reverse

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

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

Written by Jay Lepreau and David MacKenzie.

Report tac 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 tac translation bugs to <http://translationproject.org/team/>

Copyright © 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.

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

info coreutils 'tac invocation'

should give you access to the complete manual.