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 startsystemctl start httpd.service启动httpd服务service httpd stopsystemctl stop httpd.service关闭httpd服务service httpd restartsystemctl restart httpd.service重启httpd服务，而不管httpd服务的当前状态是什么service httpd reloadsystemctl reload httpd.service重新载入httpd配置信息而不中断服务service httpd condrestartsystemctl 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 statussystemctl status httpd.service查看httpd服务的运行状态chkconfig httpd onsystemctl enable httpd.service设置httpd服务开机自动开启chkconfig httpd offsystemctl disable httpd.service禁止httpd服务开机自动开启chkconfig httpdsystemctl is-enable httpd.service检查httpd服务在当前环境下是启动还是禁用的chkconfig --listsystemctl 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 --listls /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