Block procrastination sites on Ubuntu (alternative to get-shit-done)

A super simple script I made after seeing that the code of get-shit-done (https://github.com/leftnode/get-shit-done) is too long for such an easy task and discovering that

  sudo /etc/init.d/networking restart

is deprecated and does not work with network-manager on Ubuntu. The right thing to do is

  sudo restart network-manager

Hope you like it.