sudo

Executes a single command as another user.

List the contents of an unreadable directory:

sudo {{ls}} {{/usr/local/scrt}}

Edit a file as the user www:

sudo -u {{www}} {{vi}} {{/var/www/index.html}}

Shut down the machine:

sudo {{shutdown}} -h +10 {{"Cya soon!"}}

Repeat the last command as sudo:

sudo !!

Launch the default shell with root privileges:

sudo -i