systemd命令和sysvinit命令的对照信息

sysvinit命令	systemd命令	备注
service httpd start	systemctl start httpd.service	启动httpd服务
service httpd stop	systemctl stop httpd.service	关闭httpd服务
service httpd restart	systemctl restart httpd.service	重启httpd服务，无论httpd服务当前状态
service httpd reload	systemctl reload httpd.service	重载httpd配置信息而不中断服务
service httpd condrestart	systemctl condrestart httpd.service	重启httpd服务，只当httpd启动状态动作
service httpd status	systemctl status httpd.service	查看httpd服务的运行状态
chkconfig httpd on	systemctl enable httpd.service	设置httpd服务开机启动
chkconfig httpd off	systemctl disable httpd.service	禁止httpd服务开机启动
chkconfig httpd	systemctl is-enabled httpd.service	检查httpd服务在当前环境下的状态
chkconfig --list	systemctl list-unit-files --type=service	输入在加个运行级别下所有服务的启动和禁用情况
chkconfig httpd --list	ls /etc/systemd/system/*.wants/httpd.service	查看httpd服务在各个级别下的启动和禁用情况
chkconfig httpd --add	systemctl daemon-reload	创建一个新服务文件或者变更配置时使用