tac - Man Page

• Concatenate specific files in reversed order: tac path/to/file1 path/to/file2 ...
• Display stdin in reversed order: cat path/to/file | tac
• Use a specific [s]eparator: tac -s separator path/to/file1 path/to/file2 ...
• Use a specific [r]egex as a [s]eparator: tac -r -s separator path/to/file1 path/to/file2 ...
• Use a separator [b]efore each file: tac -b path/to/file1 path/to/file2 ...

tldr.sh

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 © 2024 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'

cat(1), rev(1).