1. 启动,注销等
#通过systemctl关闭服务
systemctl stop atd.service
#启动
systemctl start atd.service
#查看服务
systemctl status atd.service
2.查看服务
#列出启动的服务
systemctl
#列出安装的服务
systemctl list-unit-files
3. 管理不同的操作环境
#列出跟操作界面有关的target项目
systemctl list-units --type=target --all
#获取目前的target
systemctl get-default
#设置target
systemctl set-default multi-user.target
#不重新启动的情况下,切换操作环境
systemctl isolate graphical.target
#关机
systemctl poweroff
#重新开机
systemctl reboot
#挂起
systemctl suspend
#休眠
systemctl hibernate
#恢复模式
systemctl rescue
# 紧急恢复模式
systemctl emergency
4.查看依赖
#查看依赖
systemctl list-denpendencies
#查看被依赖
systemctl list-denpendencies --reverse
5.查看socket服务的文件
#查看socket文件
systemctl list-sockets
#查看协议和端口
cat /etc/services
6.关闭网络服务
#查看网络服务
netstat -tlunp
#查找服务
systemctl list-units -all | grep services
#关闭
systemctl stop services.service
systemctl stop services.socket
