Lab 014: Linux Run Levels
Lab 014: Linux Run Levels
Requirements
New tools have been installed on the app server in Stratos Datacenter. Some of these tools can only be managed from the graphical user interface. Therefore, there are requirements for these app servers.
On all App servers in Stratos Datacenter change the default runlevel so that they can boot in GUI (graphical user interface) by default.
Note
This lab focuses on Linux Run Levels configuration and management.
Prerequisites
- SSH access to the target server with root or sudo privileges.
- Required utilities and packages available.
Steps
Login to the App server 1 and switch to root. For the server credentials, check out the Project Nautilus documentation.
sshpass -p '******' ssh -o StrictHostKeyChecking=no tony@172.16.238.10
sudo su -
******
[root@stapp01 ~]# systemctl list-units | grep -i target
basic.target loaded active active Basic System
local-fs.target loaded active active Local File Systems
multi-user.target loaded active active Multi-User System
network-online.target loaded active active Network is Online
paths.target loaded active active Paths
remote-fs.target loaded active active Remote File Systems
slices.target loaded active active Slices
sockets.target loaded active active Sockets
sshd-keygen.target loaded active active sshd-keygen.target
swap.target loaded active active Swap
sysinit.target loaded active active System Initialization
timers.target loaded active active Timers
[root@stapp01 ~]# systemctl get-default
multi-user.target
[root@stapp01 ~]# systemctl set-default graphical.target
Removed /etc/systemd/system/default.target.
Created symlink /etc/systemd/system/default.target → /usr/lib/systemd/system/graphical.target.
[root@stapp01 ~]# systemctl get-default
graphical.target
[root@stapp01 ~]# systemctl start graphical.target
[root@stapp01 ~]# systemctl status graphical.target
● graphical.target - Graphical Interface
Loaded: loaded (/usr/lib/systemd/system/graphical.target; indirect; vendor preset: disabled)
Active: active since Wed 2023-07-26 17:50:01 UTC; 1s ago
Docs: man:systemd.special(7)
Jul 26 17:50:01 stapp01.stratos.xfusioncorp.com systemd[1]: graphical.target: Job graphical.target/start finished, result=done
Jul 26 17:50:01 stapp01.stratos.xfusioncorp.com systemd[1]: Reached target Graphical Interface.
Repeat the same steps on App server 2 and 3.
Verification
- Confirm changes applied successfully.
- Verify configuration with appropriate show/list commands.
- Test functionality if applicable.