Run Lvl Target Units Description
0 runlevel0.target, poweroff.target Shut down and power off
1 runlevel1.target, rescue.target Set up a rescue shell
2,3,4 runlevel[234].target, Set up a non-gfx multi-user shell
multi-user.target
5 runlevel5.target, graphical.target Set up a gfx multi-user shell
6 runlevel6.target, reboot.target Shut down and reboot the system