Linux / Unix Command: tac

tac – concatenate and print files in reverse

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
display this help and exit
output version information and exit

The full documentation for tac is maintained as a Texinfo manual. If the info and tac programs are properly installed at your site, the command

info tac

should give you access to the complete manual.


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