netstat -anop  查看端口

rpm -ql 文件   查找安装的文件

systemctl start nginx.service   #启动nginx服务
systemctl enable nginx.service  #设置开机自启动
systemctl disable nginx.service #停止开机自启动
systemctl status nginx.service  #查看服务当前状态
systemctl restart nginx.service  #重新启动服
systemctl list-units --type=service #查看所有已启动的服务