Privileges
$ sudo {COMMAND}
Runs a command as the root user.
$ sudo -s
Opens a shell prompt as the root user.
$ sudo -s -u {USER}
Opens a shell prompt as the specified user.
$ sudo -k
Clears out any saved passwords previously used with sudo.
$ gksudo {COMMAND}
Visual password prompt outside of the shell (Gnome)
$ kdesudo {COMMAND}
Visual password prompt outside of the shell (KDE)
$ sudo visudo
Edits the sudo user list (/etc/sudoers)
$ gksudo nautilus
Opens the Nautilus file manager as the root user (Gnome)
$ kdesudo konqueror
Opens the Konqueror file manager as the root user (KDE)
$ passwd
Changes the current user’s password.

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