rev(1) v7 man page | unix.com

REV(1)							      General Commands Manual							    REV(1)

NAME
       rev - reverse lines of a file

SYNOPSIS
       rev [ file ] ...

DESCRIPTION
       Rev  copies the named files to the standard output, reversing the order of characters in every line.  If no file is specified, the standard
       input is copied.

																	    REV(1)