Recursively rename parts of a file from the terminal

rename_files.md

Suppose you have a directory with files named rb_001.png and so on with increasing numbers. And you want to rename the rgb part of the name to image. You'll cd into that directory and execute:

find . -type f -exec rename 's/rgb/image/' '{}' \;

You'll need to install:

sudo apt-get update && sudo apt-get install rename