Man1 - tac.1

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.

GNU coreutils online help: https://www.gnu.org/software/coreutils/
Report any translation bugs to https://translationproject.org/team/

Copyright © 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later https://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.

cat(1), rev(1)

Full documentation https://www.gnu.org/software/coreutils/tac
or available locally via: info ’(coreutils) tac invocation’