Dell 5100cn Color Laser Printer - Manual (Page 292)

su
(Type the administrator's password.)
lppasswd -g sys -a root
(Type the password for authority as the printer administrator after the Enter password prompt.)
(Retype the password for authority as the printer administrator after the Enter password again prompt.)
Uninstalling the Printer Driver
1. Select Start Applications ® System ® Terminal ® Konsole.
2. Type the following command on the terminal window.
su
(Type the administrator's password)
rpm -e Dell-Laser -Printer-5100cn
The printer driver is uninstalled.