Basic Linux commands

Account management
• quota - to check your network account quota.
• yppasswd - to change your network account password.
• passwd - to change your local password.
• chmod [options] filename - to change file permissions

Exiting from a shell prompt (to close a terminal window or to log out)
• exit
• or by pressing - the general end of text control character

Starting a Terminal In Linux

In Gnome (Ubuntu)
The terminal can be found at Applications menu -> Accessories -> Terminal.

In Xfce (Xubuntu)
The terminal can be found at Applications menu -> System -> Terminal.

In KDE (Kubuntu)
The terminal can be found at KMenu -> System -> Terminal Program (Konsole).

In LXDE (Lubuntu)
The terminal can be found at Menu -> Accessories -> LXTerminal.