My favorite shell aliases
alias calc='bc -l <<<'
This one lets you calculate directly in the bash terminal like that:
If you wanna use brackets you must enclose the expression in quotes:
alias ports='lsof -i -P'
This one shows all network connections to your host. It displays more information than
netstat -anp and formats it in a nice way.
alias psu='ps -fHU $USER'
This one shows the processes of the current user in hierarchical order. Nice to see whats going on.
alias vip='sudo su'
I use this as long as I can remember for switching to root.
Hope it helps,