Have you ever created a Drupal module (or Feature) only to later realize that the name you've given it needs to be changed?
Not to worry, a couple of quick one-liners will solve this problem easily.
First, change the directory name of your old module.
mv old_module new_module
Move into the newly renamed directory.
Install rename if you don't have it already.
brew install rename
Now use the rename utility to change all the filenames within the directory.
rename 's/old_module/new_module/g;' *
Now for the fun part. Pretend you're a perl monk and use one line to rename each instance of 'old_module' to 'new_module' inside the files!
perl -pi -w -e 's/old_module/new_module/g;' *
That's it... optionally, use ack-grep (or just "ack" on Homebrew) to check your work.
ack-grep -a new_module