Mission control shortcuts stopped working, how do I restart it? I have the mouse gestures such as four finger swipe up shows mission control, or four finger swipe down shows current application's windows.

Occasionally after the computer has been on for a while, the shortcuts just stop working. Is there a way I can fix it without having to restart my entire computer?
You can restart Mission Control using the following command in Terminal:

killall Dock


This will usually fix the mouse gesture shortcuts.