CentOS7--刪除virbr0

環境：虛擬機+CentOS7.4
1.Down:
ifconfig virbr0 down
2.Delete:
brctl delbr virbr0
3.virbr0是由libvirtd服務創建，libvirtd在guest裏沒啥卵用，所以幹掉它，不然下次啟動又創建了:
systemctl disable libvirtd