以 http 为例

任务	旧指令	新指令
使服务自动启动	chkconfig --level 3 httpd on	systemctl enable httpd.service
使服务不自动启动	chkconfig --level 3 httpd off	systemctl disable httpd.service
检查服务状态	service httpd status	systemctl status httpd.service（详细信息） systemctl is-enabled httpd.service（仅显示是否 Active）
启动服务	service httpd start	systemctl start httpd.service
停止服务	service httpd stop	systemctl stop httpd.service
重启服务	service httpd restart	systemctl restart httpd.service
重新加载服务配置	service httpd reload	systemctl reload httpd.service
显示所有已启动的服务	chkconfig --list	systemctl list-units --type=service