tac
tac
tac [options] [file]
Named for the common command cat, tac prints files in reverse to standard output. Without a filename or with -, it reads from standard input. By default, tac reverses the order of the lines, printing the last line first.
Options
Print separator (by default a newline) before the string it delimits.
Expect separator to be a regular expression.
Specify alternate separator (default is newline).
Print a help message and then exit.
Print version information and then exit.