1. Gtk+ Frontend to su and sudo gksu is a Gtk+ frontend to /bin/su. It supports login shells and preserving environment when acting as a su frontend. It is useful to menu items or other graphical programs that need to ask a user's password to run another program as another user. gksu can also act as a frontend to sudo. It installs a link /usr/bin/gksudo, which you can call to use this feature. When using sudo, gksudo respects /etc/sudoers definitions. From Debian 3.0r0 APT