mmv: Mass moving and renaming files

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Software

Mmv is command-line tool which allows the user to move, rename, copy, append and link large amounts of files with a single command. The tool is especially useful when you need to rename a lot of files that have similar filenames, yet subtle differences.

Although mmv does more than just renaming files, this article will focus only on renaming because that is what I use it for the most. The tool is best explained using an example.

Suppose you have the following files in a directory:
foo1.png
foo2.png
bar3.png

You want all the files that start with ‘foo’ to instead start with ‘bar’.

More Here.