Reinstallation of X11 and Gnome Desktop in RHEL

Reinstallation of X11 and Gnome is often the only way to fix malfunctioning Gnome.

The idea is to install full set of packages before re-installation

Afterward we can verify the packages with

rpm -VA

# yum groupinstall "X Window System" "GNOME Desktop Environment"

# yum reinstall "@X Window System" "@GNOME Desktop Environment"

If reinstallation is OK, let's see if we missing something:

# yum groupupdate "X Window System" "GNOME Desktop Environment"

For RHEL 6 the procedure is very similar:

# yum groupinstall "X Window System" "Desktop" "Desktop Platform" "General Purpose Desktop"
 
# yum reinstall "@X Window System" "@Desktop" "@Desktop Platform" "@General Purpose Desktop"
 
# yum groupupdate "X Window System" "Desktop" "Desktop Platform" "General Purpose Desktop"

From runlevel 3 you need manually start Gnome

startx > /tmp/startx.out

If it is OK you need to stop Gnome using Ctrl-C and try switching to runlvel 5 using the command:

init 5

If this is OK, then you need to change back runlevel to which to boot   to 5. But it might be not and then you need to specify the command

startx &> /tmp/startx.out

as a custom init script on level 3 (for example adding it to /etc/init.d/local).

Note: Sometimes Gnome runs OK from runlevel 3 but not level 5 (looks like Red Hat screw patching of version 5 from, say, 5.8 to 5.10). If not you need to get output of the the following command from runlevel 3, to give more specific information about where the X failure is occurring.

NEWS CONTENTS

• 20130718 : how to enable GUI in rhel 6 ( how to enable GUI in rhel 6, Jul 18, 2013 )
• 20130718 : [CentOS] Installing a gnome-desktop on CENTOS-6.3 following minimal system install. - Grokbase ( [CentOS] Installing a gnome-desktop on CENTOS-6.3 following minimal system install. - Grokbase, )
• 20130718 : Oct 5, 2012 at 9:31 am ( )
• 20130718 : Installing the Graphical Window System (X.org-X11) and the Default Desktop Environment on CentOS 6 ( Installing the Graphical Window System (X.org-X11) and the Default Desktop Environment on CentOS 6 , )
• 20130718 : Centos - Installing graphical X Window System (Boot Options, startx from command line) ( Centos - Installing graphical X Window System (Boot Options, startx from command line), )

Old News ;-)

[Jul 18, 2013] how to enable GUI in rhel 6

02-03-2011, 03:11 PM #3
John VV
Guru

Registered: Aug 2005
Posts: 9,916

Rep: servers normally DO NOT have a gui, there is no monitor attached to the server / blade center

if this is a desktop install of RHEL6.0 did you buy the license
http://www.redhat.com/rhel/benefits/
http://www.redhat.com/rhel/desktop/

also did you install gnome ????
In RHEL 6 when u install OS & don't use the customized option so you will not get the GUI
if you select that option at the time of OS installation you will select the kde of Gnome etc

Following steps can resolve your prob

Quote:
yum groupinstall "X Window System" "GNOME Desktop Environment"

need KDE

yum groupinstall "X Window System" KDE

need XFCE
yum groupinstall "X Window System" XFCE

Thanks
dkpant

[CentOS] Installing a gnome-desktop on CENTOS-6.3 following minimal system install. - Grokbase

Nux!

Oct 5, 2012 at 9:31 am ⇧

On 05.10.2012 14:05, James B. Byrne wrote:

So what is it that I am missing? What other step is required to get
my 'normal' gnome desktop with the utilities ans such displayed in
the
title bar?

Try:

yum groupinstall "Desktop" "Desktop Platform" "General Purpose Desktop"

Btw, you can't really have "minimal" AND "gnome" ... :-)

Nux!
www.nux.ro

Installing the Graphical Window System (X.org-X11) and the Default Desktop Environment on CentOS 6

LinuxQuestions.org

Posted 09-06-2011 at 01:12 PM by gearge
Updated 11-26-2011 at 02:29 PM by gearge Installing the Graphical Window System (X.org-X11) and the Default Desktop Environment on CentOS 6

Performing the default "Minimal" install of CentOS 6 does not install the graphical subsystem (the X.org server) and the desktop environment (e.g. GNOME or KDE). Such OS install is nice for building an optimal system from scratch, setting up a headless server (no monitor, keyboard and mouse) and other purposes; but for one reason or another, you may still require a graphical user interface (GUI). This tutorial will show you how to install and start the graphical window system and the desktop environment of your choice.

To achieve the task, you will need to install the following package groups (groups of packages combined for a common purpose): "X Window System", "Desktop", "Fonts" and "General Purpose Desktop" (last two are optional). This will install about 500 additional packages on your system (~250MB download, or you may use the available OS installation DVD to retrieve packages).

Code:

yum -y groupinstall "X Window System" "Desktop" "Fonts" "General Purpose Desktop"

(Please enter this as is - package group names as well as package names are case sensitive).

Previous versions of RHEL and its derivatives provided a package group called "GNOME Desktop Environment", that was sufficient for a general purpose GNOME desktop. Currently, package group "Desktop" installs all critical components of GNOME, including gdm (the GNOME Display Manager), plus a few additional packages; enough to provide a minimalist GNOME desktop with mouse support, a graphical file manager, copy/paste functionality and the luxurious GNOME Terminal emulator - maybe just what you need. Thus, installing the "General Purpose Desktop" package group is optional, but will help you mimic the system you would probably get if you where to include the default graphical desktop during OS install. Alternatively, you can chose a single package group "KDE Desktop", for a general purpose KDE Software Compilation.

It is generally recommended to install the "Fonts" package group to improve usability of the GUI, no matter what desktop environment you choose to install.

You may view the complete list of available package groups by issuing:

Code:

yum grouplist

You may review the contents of each package group by entering:

Code:

yum groupinfo "Name of the Package Group"

To boot directly into GUI, you will need to manually change the runlevel of the system from 3 (full multiuser environment with networking) to 5 (the same as mode 3 + X11), by changing the line "id:3:initdefault:" to "id:5:initdefault:" in /etc/inittab file. Or you can manually start X.org from console, by entering "startx" (without quotes).

Upon installation and subsequent reboot, you will be presented with the "Setup Agent" interface (even if you choose to stay in runlevel 3, you will see the text user interface of this tool - hence, the options provided will be different from the graphical variant). This is due to package "firstboot" being automatically installed by the "X Window System" package group and can be a handy way to setup a freshly installed system. All steps in "Setup Agent" are optional, so you can just skim through them, skipping any. Though, creating a new normal user on a freshly installed system is done best through this graphical tool, as it helps automatically create the new user and associate it with groups (such as the "video" group) appropriate for everyday use in a GUI environment . So, for the purpose of this tutorial, I would advice not skipping the user creation step.

The console interface for "firstboot"

Centos - Installing graphical X Window System (Boot Options, startx from command line)

Nov 13, 2012 | leerraum blog

Installing GUI

Installing the Graphical Window System (X.org-X11) and the Default Desktop Environment on CentOS 6

Performing the default "Minimal" install of CentOS 6 does not install the graphical subsystem (the X.org server) and the desktop environment (e.g. GNOME or KDE). Such OS install is nice for building an optimal system from scratch, setting up a headless server (no monitor, keyboard and mouse) and other purposes; but for one reason or another, you may still require a graphical user interface (GUI). This tutorial will show you how to install and start the graphical window system and the desktop environment of your choice.

To achieve the task, you will need to install the following package groups (groups of packages combined for a common purpose): "X Window System", "Desktop", "Fonts" and "General Purpose Desktop" (last two are optional). This will install about 500 additional packages on your system (~250MB download, or you may use the available OS installation DVD to retrieve packages).

Code:

yum -y groupinstall "X Window System" "Desktop" "Fonts" "General Purpose Desktop"

(Please enter this as is - package group names as well as package names are case sensitive).

Previous versions of RHEL and its derivatives provided a package group called "GNOME Desktop Environment", that was sufficient for a general purpose GNOME desktop. Currently, package group "Desktop" installs all critical components of GNOME, including gdm (the GNOME Display Manager), plus a few additional packages; enough to provide a minimalist GNOME desktop with mouse support, a graphical file manager, copy/paste functionality and the luxurious GNOME Terminal emulator - maybe just what you need. Thus, installing the "General Purpose Desktop" package group is optional, but will help you mimic the system you would probably get if you where to include the default graphical desktop during OS install. Alternatively, you can chose a single package group "KDE Desktop", for a general purpose KDE Software Compilation.

It is generally recommended to install the "Fonts" package group to improve usability of the GUI, no matter what desktop environment you choose to install.

You may view the complete list of available package groups by issuing:

Code:

yum grouplist

You may review the contents of each package group by entering:

Code:

yum groupinfo "Name of the Package Group"

Enabling booting into GUI - start GUI from command line

To boot directly into GUI, you will need to manually change the runlevel of the system from 3 (full multiuser environment with networking) to 5 (the same as mode 3 + X11), by changing the line "id:3:initdefault:" to "id:5:initdefault:" in /etc/inittab file. Or you can manually start X.org from console, by entering "startx" (without quotes).

Upon installation and subsequent reboot, you will be presented with the "Setup Agent" interface (even if you choose to stay in runlevel 3, you will see the text user interface of this tool - hence, the options provided will be different from the graphical variant). This is due to package "firstboot" being automatically installed by the "X Window System" package group and can be a handy way to setup a freshly installed system. All steps in "Setup Agent" are optional, so you can just skim through them, skipping any. Though, creating a new normal user on a freshly installed system is done best through this graphical tool, as it helps automatically create the new user and associate it with groups (such as the "video" group) appropriate for everyday use in a GUI environment .

If you have installed the X Window System but are not seeing a graphical desktop environment once you log into your Red Hat Enterprise Linux system, you can start the X Window System graphical interface using the command startx.

Once you enter this command and press Enter, the graphical desktop environment is displayed.

Note, however, that this is just a one-time fix and does not change the log in process for future log ins.

To set up your system so that you can log in at a graphical login screen, you must edit one file,/etc/inittab, by changing just one number in the runlevel section. When you are finished, reboot the computer. The next time you log in, you are presented with a graphical login prompt.

Open a shell prompt. If you are in your user account, become root by typing the su command.

Now, type gedit /etc/inittab to edit the file with gedit. The file /etc/inittab opens. Within the first screen, a section of the file which looks like the following appears:

# Default runlevel. The runlevels used by RHS are: 
#   0 - halt (Do NOT set initdefault to this) 
#   1 - Single user mode 
#   2 - Multiuser, without NFS (The same as 3, if you do not have networking) 
#   3 - Full multiuser mode 
#   4 - unused 
#   5 - X11 
#   6 - reboot (Do NOT set initdefault to this) 
#  id:3:initdefault:

To change from a console to a graphical login, you should change the number in the lineid:3:initdefault: from a 3 to a 5.

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