RHEL7指令
| 任务 | 旧指令 | 新指令 |
| 使某服务自动启动 | chkconfig --levle 235 httpd on | systemctl enable httpd.service |
| 使某服务不自动启动 | chkconfig --levle 235 httpd off | systemctl disable httpd.service |
| 检查服务状态 | service httpd status | systemctl enable httpd.service(服务详细信息) systemctl is-active httpd.service（仅显示是否Active |
| 显示所有已启动的服务 | chkconfig --list | systemctl list-units --type=service |
| 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 restart | systemctl restart httpd.service |
原文：http://huazhixu123.blog.51cto.com/1591874/1972768