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.
cd new_module
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