LC_CTYPE
The character encoding locale(1). It decides which byte sequences form characters. If unset or set to "C", "POSIX", or an unsupported value, the order of individual bytes is reversed.
rev1
Reverse lines of a file
Usage
rev [file ...]
Overview
The rev utility copies the specified files to the standard output, reversing the order of characters in every line. If no files are specified, the standard input is read.
Environment
Releases
61 releases since OpenBSD 2.1; the text changed 6 times.