之前在 \o "CentOS" CentOS7下配置过bridge，现在讲bridge模式改为普通模式后，查看网卡的时候还是可以看到很多垃圾信息，想彻底删除自己不想要的网卡配置信息，操作如下:

[root@linux-node1 ~]# ip add list?1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1?? ? link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00?? ? inet /8 scope host lo?? ? ? valid_lft forever preferred_lft forever?? ? inet6 ::1/128 scope host??? ? ? valid_lft forever preferred_lft forever?2: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000?? ? link/ether 00:0c:29:9b:7d:d6 brd ff:ff:ff:ff:ff:ff?? ? inet 1/24 brd 55 scope global eth0?? ? ? valid_lft forever preferred_lft forever?? ? inet6 fe80::20c:29ff:fe9b:7dd6/64 scope link??? ? ? valid_lft forever preferred_lft forever?4: virbr0: mtu 1500 qdisc noqueue state DOWN qlen 1000?? ? link/ether 52:54:00:f4:24:05 brd ff:ff:ff:ff:ff:ff?? ? inet /24 brd 55 scope global virbr0?? ? ? valid_lft forever preferred_lft forever?5: virbr0-nic: mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000?? ? link/ether 52:54:00:f4:24:05 brd ff:ff:ff:ff:ff:ff?查看网络列表：?[root@linux-node1 ~]# virsh net-list??Name? ? ? ? ? ? ? ? State? ? ? Autostart? ? Persistent?----------------------------------------------------------??default? ? ? ? ? ? ? active? ? yes? ? ? ? ? yes使用“virsh net-destroy default”删除?[root@linux-node1 ~]# virsh net-destroy default?Network default destroyed?从配置文件中剔除?[root@linux-node1 ~]# virsh net-undefine default?Network default has been undefined?重启libvirtd服务?[root@linux-node1 ~]# systemctl restart libvirtd.service?[root@linux-node1 ~]# virsh net-list??Name? ? ? ? ? ? ? ? State? ? ? Autostart? ? Persistent?----------------------------------------------------------?[root@linux-node1 ~]# ip add list?1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1?? ? link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00?? ? inet /8 scope host lo?? ? ? valid_lft