systemctl 服务管理

以httpd为例

启动、重启、停止、重载服务以及检查服务

systemctl start httpd.service
systemctl restart httpd.service
systemctl stop httpd.service
systemctl reload httpd.service
systemctl status httpd.service  #检测某服务是否正在运行

启用或禁用

列出所有服务（包括启用的和禁用的）

systemctl list-unit-files --type=service

激活服务并在启动时启用或禁用服务

systemctl is-active httpd.service
systemctl enable httpd.service
systemctl disable httpd.service

监测某服务是否启用

systemctl is-enabled httpd.service
enabled

杀死服务

systemctl kill httpd

更多systemctl命令：https://linux.cn/article-5926-1.html