TAC(1) General Commands Manual TAC(1) (NAME) tac - (SYNOPSIS) tac [OPTION]... [FILE]... (DESCRIPTION) . (OPTIONS) -b, --before -r, --regex (regular expression) -s, --separator STRING (newline) -h, --help -V, --version (VERSION) v(uutils coreutils) 0.11.0 2026-09-01 TAC(1)