关于Linux一些命令说明

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# systemctl #输出已**单元 
# systemctl list-units #输出已**单元 
# systemctl --failed #输出运行失败的单元 
# systemctl list-unit-files #查看所有已安装服务 
# systemctl start nginx #启动nginx 
# systemctl stop nginx #停止nginx 
# systemctl restart nginx #重启nginx 
# systemctl reload nginx #重新加载nginx配置 
# systemctl status nginx #输出nginx运行状态 
# systemctl is-enabled nginx #检查nginx是否配置为自动启动 
# systemctl enable nginx #开机自动启动nginx 
# systemctl disable nginx #取消开机自动启动nginx 
# systemctl help nginx #显示nginx的手册页 
# systemctl daemon-reload #重新载入 systemd，扫描新的或有变动的单元 
# systemctl reboot #重启 
# systemctl poweroff #退出系统并停止电源 
# systemctl suspend #待机 
# systemctl hibernate #休眠 
# systemctl hybrid-sleep #混合休眠模式（同时休眠到硬盘并待机 
# systemctl isolate graphical.target #等价于telinit 3 或 telinit 5