TAC(1) TAC(1) tac - tac []... []... "-" -b, --before -r, --regex -s, --separator= --help --version Jay Lepreau David MacKenzie GNU coreutils GNU coreutils Copyright (C) 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later . cat(1), rev(1) info '(coreutils) tac invocation' man man https://github.com/man-pages-zh/manpages- zh GNU coreutils 9.1 20229 TAC(1)