https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/System_Administrators_Guide/sect-Managing_Services_with_systemd-Targets.html
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
时间： 2024-10-11 05:45:53