Print version information on standard output then exit.

--version
Print a usage message and exit with a status code indicating success.

--help
as the record separator.
string
Use
-s string, --separator=string
The separator is a regular expression.
-r, --regex
precedes in the file.
The separator is attached to the beginning of the record that it
-b, --before

OPTIONS

in the file.
separator string is attached to the end of the record that it follows
instances of a string, or a newline if none is given. By default, the
the order of the records reversed. The records are separated by
when a file name of `-' is encountered, to the standard output with
tac copies each given file, or the standard input if none are given or

or incomplete. The Texinfo documentation is now the authoritative source.
This documentation is no longer being maintained and may be inaccurate
This manual page documents the GNU version of tac.

DESCRIPTION


[--help] [--version] [file...]
tac [-br] [-s separator] [--before] [--regex] [--separator=separator]

SYNOPSIS


tac - concatenate and print files in reverse, linewise, i.e. up/down

NAME

tac

seedoc of tac