主题
systemctl list-unit-files 查看开机启动项
systemctl list-unit-files
systemctl list-unit-files | grep 程序名称 查看某些服务开机启动状态
systemctl list-unit-files | grep 程序名称
systemctl list-unit-files | grep enable 查看哪些为开机启动服务
systemctl list-unit-files | grep enable