[objectiveariel]

In my bash_profile is a simple echo which makes the shell say hi to me every time I open an instance. Brightens my day a little bit:

  echo 'Hello dude '

As an iOS dev, this one is super useful:

  alias cdd='rm -rf ~/Library/Developer/Xcode/DerivedData/* && echo "Cleared DerivedData/"'

[sleepychu]

cdd seems like a bananas alias for something that does an rm -rf!

Have you ever done it by mistake?

[saagarjha]

It doesn't really matter; the directory is Xcode's auto-generated build products and can be recreated quite easily.