Use trash instead of rm
When you delete files and folders from the command line with the rm command, you have no way of undoing it. Whatever you delete is gone.
A friend of mine once, and I’m sure you have one too, accidently wrote rm -rf * once and it’s not super fun. Don’t. Instead, use trash-cli on OS X and you will have a new trash command that moves your files to the trash instead of deleting them straight out.
There’s also a package for emptiying the trash.
npm install --global trash-cli empty-trash