FreeBSD 11.0 - man page for rev (freebsd section 1)

REV(1)							    BSD General Commands Manual 						    REV(1)

NAME
     rev -- reverse lines of a file

SYNOPSIS
     rev [file ...]

DESCRIPTION
     The rev utility copies the specified files to the standard output, reversing the order of characters in every line.  If no files are speci-
     fied, the standard input is read.

BSD
								   June 9, 1993 							       BSD