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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

AUTHOR

Written by Jay Lepreau and David MacKenzie.

REPORTING BUGS

Report tac bugs to bug−coreutils [AT] 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

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.

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 command

info coreutils 'tac invocation'

should give you access to the complete manual.

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