Rename is a simple command-line tool which lets you easily rename your files using regular expressions (RegEx).
As we will see in the examples below, the syntax is pretty straightforward.
This command will loop through a chosen directory and translates uppercase filenames to lowercase.
This code is used to add a prefix to every filename.
You can use this command to replace all occurrences of the the string X with Y in every filename.
NOTE: Rename is included by default in almost all Linux distributions.