Nginx在Linux中命令扩展

一 .systemctl 命令

1.1 网络服务

#启动网络服务
systemctl start firewalld.service

#停止网络服务
systemctl stop firewalld.service

#重启网络服务
systemctl restart firewalld.service

#查看网络服务状态
systemctl status firewalld.service

1.2 设置开机启动/不启动

#停止cup电源管理服务
systemctl stop cups.service

#禁止cups服务开机启动
systemctl disable cups.service

#查看cups服务状态
systemctl status cups.service

#重新设置cups服务开机启动
systemctl enable cups.service

1.3 查看系统上上所有的服务 

#列出所有启动unit
systemctl list-units

#列出所有启动文件
systemctl list-unit-files	

#列出所有service类型的unit
systemctl list-units –type=service –all	

#列出 cpu电源管理机制的服务
systemctl list-units –type=service –all grep cpu	

#列出所有target
systemctl list-units –type=target –all	

1.4 systemctl特殊的用法

#查看网络服务是否启动
systemctl is-active network.service

#检查网络服务是否设置为开机启动
systemctl is-enable network.service

#停止cups服务
systemctl stop cups.service

#注销cups服务
systemctl mask cups.service

#查看cups服务状态
systemctl status cups.service

#取消注销cups服务
systemctl unmask cups.service

1.5 开关机相关的其他命令

#进入睡眠模式
systemctl suspend	

#进入休眠模式
systemctl hibernate
	
#强制进入救援模式
systemctl rescue	

#强制进入紧急救援模式
systemctl emergency	

1.6  设置运行级别

#获得当前的运行级别
systemctl get-default	

#设置默认的运行级别为mulit-user
systemctl set-default multi-user.target	

#在不重启的情况下，切换到运行级别mulit-user下
systemctl isolate multi-user.target	

#在不重启的情况下，切换到图形界面下
systemctl isolate graphical.target	

1.7 关闭防火墙firewall

systemctl stop firewalld.service

systemctl disable firewalld.service