Centos7 modify run level

Systemd uses a more free target concept than the sysvinit runtime level as a replacement for the third runtime level: multi-user.target fifth runtime level: faster getrunl faster EMD uses a more free target concept than sysvinit's run level as an alternative to the third run level: multi-user.target fifth run level: graphical.tar get marker is the symbol chain pointing to the back targetrunlevel3.tar get-> multi-user.targetrunlevel5.target-> graphical.tar get # switch: run Level 3 # both can be systemctl isolate multi-user.targetsystemctl isolate runl Evel3.target # switch to: running level 5 # both of them can be systemctl isolate graphical.tar getsystemctl isolate runleve5.target # Modify the default running level when starting the system. systemd uses the link to point to the default running level. It is determined by the/etc/systemd/system/default.tar get file to switch to runtime level 3: delete first: /etc/systemd/system/default.tar getln-sf/lib/systemd/system/multi-user.target/etc/systemd/system/default.tar getln-sf/lib/systemd/system/runlevel3.target/etc /systemd/system/default.tar get # with this can also systemctl set-default multi-user.target switch to the runtime level 5ln-sf/lib/systemd/system/graphical.tar get/etc/systemd/system/default.tar getln-sf/lib/systemd/system/runlevel5.target/etc/systemd/system/default.tar get # use this function to set systemctl-default graphical.tar get # View runlevel // Still available