Viewing the Default Target

To determine which target unit is used by default, run the following command:

systemctl get-default

 Viewing the Current Target

To list all currently loaded target units, type the following command at a shell prompt:

systemctl list-units --type target

By default, the systemctl list-units command displays only active units. If you want to list all loaded units regardless of their state, run this command with the --all or -a command line option:

systemctl list-units --type target --all

 Changing the Default Target

To configure the system to use a different target unit by default, type the following at a shell prompt as root:

systemctl set-default name.target

 Changing the Current Target

To change to a different target unit in the current session, type the following at a shell prompt as root:

systemctl isolate name.target

From the above list select Server with GUI installation group:

[root@rhel7 ~]# yum groupinstall 'Server with GUI'Transaction Summary=================Install  261 Packages (+604 Dependent packages)Total download size: 527 MInstalled size: 1.7 GIs this ok [y/d/N]:

Just because gnome desktop environment is a default GUI on RHEL 7 linux system the above command will install gnome. Alternatively, you can run the below command to only install core GNOME packages:

[root@rhel7 ~]# yum groupinstall 'X Window System' 'GNOME'

Once the installation is finished, you need to change system's runlevel to runlevel 5. Changing runlevel on RHEL 7 is done by use ofsystemctl command. The below command will change runlevel from runlevel 3 to runelevel 5 on RHEL 7:

[root@rhel7 ~]# systemctl enable graphical.target --force

Depending on your previous installations you may need to accept Redhat License after you reboot your system. Once you boot to your system you can check GNOME version using:

[root@rhel7 ~]# gnome-shell --versionGNOME Shell 3.8.4