tac(1) - man - phpman

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⚡ TLDR: tac (tldr-pages)

Display and concatenate files with lines in reversed order.

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 separator
tac {{-s|--separator}} {{separator}} {{path/to/file1 path/to/file2 ...}}
Use a specific `regex` as a separator
tac {{-r|--regex}} {{-s|--separator}} {{separator}} {{path/to/file1 path/to/file2 ...}}
Use a separator before each file
tac {{-b|--before}} {{path/to/file1 path/to/file2 ...}}

TAC(1) User Commands TAC(1)

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

COPYRIGHT
Copyright © 2020 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.