Systemd

systemctl

• show
• list-units
• start
• stop
• restart
• condrestart
• status
• enable
• disable
• is-enabled
• isolate 类似改变运行级别
• default
• rescue
• halt
• poweroff
• reboot

Target

类似运行基本

• poweroff.target
• rescue.target
• multi-user.target
• graphical.target
• reboot.target

设置启动运行级别

>>> ln -sf /lib/systemd/system/graphical.target /etc/systemd/system/default.target

重要目录

• /lib/systemd/system/*.service
• /etc/systemd/system/*.service
• /etc/systemd/system/*.wants/