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.

AVAILABILITY
     The rev command is part of the util-linux-ng package and is available
     from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.