tac

concatenate and print files in reverse

TLDR

Print the contents of file1 reversed to the standard output

$ tac [file1]

Print the contents of the standard input reversed to the standard output

$ [command] | tac

Concatenate several files reversed into the target file

$ tac [file1] [file2] > [target_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

REPORTING BUGS

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

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.

AUTHOR

Written by Jay Lepreau and David MacKenzie.

tac