Centos 7网络服务无法启动

错误日志：

GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Method "GetManagedObjects" with signature "" on interface "org.freedesktop.DBus.ObjectManager" doesn't exist

解决方法1：

systemctl restart NetworkManager

解决方法2：

systemctl stop NetworkManager
systemctl restart network