systemctl命令是系统服务管理器指令，它实际上将 service 和 chkconfig 这两个命令组合到一起。
| 任务 | 旧指令 | 新指令 |
| 使某服务自动启动 | chkconfig --level 3 httpd on
chkconfig --level 3 httpd on
|
systemctl enable httpd.service |
| 使某服务不自动启动 | chkconfig --level 3 httpd off | systemctl disable httpd.service |
| 检查服务状态 | service httpd status |
systemctl status httpd.service （服务详细信息） systemctl is-active httpd.service （仅显示是否 Active) systemctl disable httpd.service
|
| 显示所有已启动的服务 | chkconfig --list | systemctl list-unit-files|grep enabled |
| 启动某服务 | service httpd start | systemctl start httpd.service |
| 停止某服务 | service httpd stop | systemctl stop httpd.service |
| 重启某服务 | service httpd restar | systemctl restart httpd.service |
原文来自：http://man.linuxde.net/systemctl