Manual Pages  — REV

rev – reverse lines of a file

SYNOPSIS DESCRIPTION EXAMPLES

rev [file ...]

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.

Reverse the text from stdin:

$ echo -e "reverse \t these\ntwo lines" | rev
eseht    esrever
senil owt