tac

concatenate and print files in reverse

TLDR

Print the contents of *file1* reversed to the standard output

$ tac [file1]
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Print the contents of the standard input reversed to the standard output

$ [command] | tac
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Concatenate several files reversed into the target file

$ tac [file1] [file2] > [target_file]
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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

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.

SEE ALSO

rev(1) Full documentation <https://www.gnu.org/software/coreutils/tac> or available locally via: info '(coreutils) tac invocation'

AUTHOR

Written by Jay Lepreau and David MacKenzie.

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