1 启动命令
systemctl isolate graphical.target
2 启动过程:
文件:/etc/systemd/system/graphical.target
来自:systemd包
内容:
[Unit]
Description=Graphical Interface
Documentation=man:systemd.special(7)
Requires=multi-user.target
Wants=display-manager.service
Conflicts=rescue.service rescue.target
After=multi-user.target rescue.service rescue.target display-manager.service
AllowIsolate=yes
文件:/etc/systemd/system/display-manager.service
来自:安装lightdm包时自己主动生成
内容:链接到/lib/systemd/system/lightdm.service
文件:/lib/systemd/system/lightdm.service
来自:lightdm包
内容:
[Unit]
Description=Light Display Manager
Documentation=man:lightdm(1)
[email protected]
After=systemd-user-sessions.service [email protected] plymouth-quit.service livesys-late.service
[Service]
ExecStart=/usr/sbin/lightdm
Restart=always
IgnoreSIGPIPE=no
BusName=org.freedesktop.DisplayManager
[Install]
Alias=display-manager.service
文件: /user/sbin/lightdm
来自:lightdm包
内容:二进制可运行文件。启动图形界面。