rev

Rev reverses the lines of a file. This utility will copy the files specified in the command to standard output while reversing the order of each of the characters in every line. If no files are specified, it will use standard input and read in lines.

The general format is:

$ rev [file...]

A simple example is:

$ rev HelloWorld.cpp

This will output !dlroW olleH if the file was “Hello World!”

Useful Options

Examples

$ echo "Pat Pannuto" | rev

Will output: otunnaP taP

$ rev myFile.cpp

Will output: oG !eulB

If the original file said: Go Blue!