RedHat 7 修改系统启动级别并安装GHONE桌面环境

23rewr

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/System_Administrators_Guide/sect-Managing_Services_with_systemd-Targets.html http://linuxconfig.org/install-gnome-gui-on-rhel-7-linux-server Viewing the Default TargetTo determine which target unit is used by default, run the following command:
systemctl get-default Viewing the Current TargetTo list all currently loaded target units, type the following command at a shell prompt:
systemctl list-units --type targetBy 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 TargetTo 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 TargetTo change to a different target unit in the current session, type the following at a shell prompt as root:
systemctl isolate name.targetFrom the above list select Server with GUI installation group:
[iyunv@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:
[iyunv@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:
[iyunv@rhel7 ~]# systemctl enable graphical.target --forceDepending 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:
[iyunv@rhel7 ~]# gnome-shell --versionGNOME Shell 3.8.4