systemctl命令用法详解
系统环境：Fedora 16
binpath：/bin/systemctl
package：systemd-units
systemctl enable httpd.service
将httpd服务设为开机自动启动
systemctl disable httpd.service
禁止httpd服务开机自动启动
systemctl status httpd.service
查看httpd服务的运行状态
//Loaded行中的enabled表示该服务是开机自动启动的，disable表示该服务不是开机自动启动的
systemctl is-active httpd.service
检查httpd服务是否处于活动状态
systemctl start httpd.service
启动httpd服务
systemctl stop httpd.service
停止httpd服务
systemctl restart httpd.service
重新启动httpd服务