Stuff
!! Last command (sudo !!)
!* Last command's parameters (vim !*)
!^ Last command's first parameter
!$ Last command's last parameter
!?ls<tab> Command and params of last `ls` command (sudo !?mv<tab>)
!?ls?:*<tab> Params of last `ls` command
*(m0) Last modified today
*(m-4) Last modified <4 days ago
Change default shell
chsh -s `which zsh`