How do I uninstall a GUI Gnome login system ( GDM ) from my CentOS Linux v5.5 based server?
GDM is the GNOME Display Manager, a graphical login program for Redhat, RHEL, Fedora and CentOS Linux based systems. The X Window System by default uses the XDM display manager which needs editing files. GDM allows to customize login using GUI based tools. It also supports customization with themes.
Fig.01: CentOS GNOME Display Manager
Method # 1: Delete GDM and X Window
Type the following command:
# yum groupremove "X Window System"
Reboot the systems:
# reboot
Method # 2: Disable GDM and X Windows Login For All Sessions
Edit /etc/inittab, enter:
# vi /etc/inittab
Find:
id:5:initdefault:
Replace with:
id:3:initdefault:
Save and close the file. Stop currently running GUI session:
# init 3
Method # 3: Temporarily Disable GDM and X Windows Login For Current Sessions
Just type the following command:
# init 3
To get back to GUI login session again, enter:
# init 5
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Another Method:
If your CentOS/RHEL box is powered off, and you want to make sure it boots to runlevel 3 (No X Server) then:
- Start the server and access your bootmanager (grub/lilo).
- edit your boot entry
- inside your boot entry is a line starting with “kernel”
- add a ” 3″ (without quotation marks) to the end of the line
- boot
This change will be lost after the next reboot.
To make the change permanent, just refer to “Method 2″ in the Article ;)