CentOS 7系统服务管理工具systemctl介绍

一 启动、停止、重启服务

启动httpd服务：systemctl start httpd.service

停止httpd服务：systemctl stop httpd.service

重启httpd服务：systemctl restart httpd.service

运行态重启httpd服务：systemctl condrestart httpd.service

重新加载httpd服务配置文件：systemctl reload httpd.service

 

二 查看、禁止、启动服务

开机启动httpd服务：systemctl enable httpd.service

开机禁止httpd服务：systemctl disable httpd.service

查看httpd服务状态：systemctl status httpd.service

 

三 systemd命令和sysvinit命令对比

sysvinit命令	systemd命令	备注
service httpd start	systemctl start httpd.service	启动httpd服务
service httpd stop	systemctl stop httpd.service	关闭httpd服务
service httpd restart	systemctl restart httpd.service	重启httpd服务，而不管httpd服务的当前状态是什么
service httpd reload	systemctl reload httpd.service	重新载入httpd配置信息而不中断服务
service httpd condrestart	systemctl condrestart httpd.service	重启httpd服务，如果已在运行，则重启httpd服务，如果没有运行，则无法启动这个服务
service httpd status	systemctl status httpd.service	查看httpd服务的运行状态
chkconfig httpd on	systemctl enable httpd.service	设置httpd服务开机自动开启
chkconfig httpd off	systemctl disable httpd.service	禁止httpd服务开机自动开启
chkconfig httpd	systemctl is-enable httpd.service	检查httpd服务在当前环境下是启动还是禁用的
chkconfig --list	systemctl list-unit-files --type=service	输出在各个运行级别下所有服务启动还是禁用情况
chkconfig httpd --list	ls /etc/systemd/system/*.wants/httpd.service	查看httpd服务在各个运行级别下的启用和禁用情况

四 systemd电源管理命令

systemctl命令	含义
systemctl poweroff	关闭系统
systemctl reboot	重启系统
systemctl suspend	进入待机模式
systemctl hibernate	进入休眠模式
systemctl hybrid-sleep	进入混合休眠模式