gksudo

GUIなsudo
https://help.ubuntu.com/community/RootSudo

Graphical sudo

You should never use normal sudo to start graphical applications as root. You should use gksudo to run such programs

For users of Kubuntu, use kdesu instead of gksudo.

Examples:

gksudo gedit /etc/fstab

or

kdesu kate /etc/X11/xorg.conf

めも