- Print the contents of *file1* reversed to the standard output:tac [file1]- Concatenate several files reversed into the target file:tac [file1] [file2] > [target_file]
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.
Written by Jay Lepreau and David MacKenzie.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report tac translation bugs to <http://translationproject.org/team/>
Copyright © 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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.
Full documentation at: <http://www.gnu.org/software/coreutils/tac> or available locally via: info '(coreutils) tac invocation'