Linux Command Library
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tac

concatenate and print files in reverse

- Print the contents of *file1* reversed to the standard output:
tac [file1]

- Concatenate several files reversed into the target file:
tac [file1] [file2] > [target_file]

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: <http://www.gnu.org/software/coreutils/> Report tac translation bugs to <http://translationproject.org/team/>

Copyright © 2016 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.

rev(1)

Full documentation at: <http://www.gnu.org/software/coreutils/tac> or available locally via: info '(coreutils) tac invocation'

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