（1）systemctl
路径：/etc/systemd/system/下的service
说明：
每次更改服务脚本内容后更新：
systemctl daemon-reload
systemctl enable auto_run_script.service
（2）指令
| 任务 | 指令 |
| 使某服务自动启动 | systemctl enable httpd.service |
| 使某服务不自动启动 | systemctl disable httpd.service |
| 检查服务状态 | systemctl status httpd.service |
| 显示所有已启动的服务 | systemctl list-units –type=service |
| 启动某服务 | systemctl start httpd.service |
| 停止某服务 | systemctl stop httpd.service |
| 重启某服务 | systemctl restart httpd.service |
