说明：之前在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~]#ipaddlist1:lo:<LOOPBACK,UP,LOWER_UP>mtu65536qdiscnoqueuestateUNKNOWNqlen1link/loopback00:00:00:00:00:00brd00:00:00:00:00:00inet127.0.0.1/8scopehostlovalid_lftforeverpreferred_lftforeverinet6::1/128scopehostvalid_lftforeverpreferred_lftforever2:eth0:<BROADCAST,MULTICAST,UP,LOWER_UP>mtu1500qdiscpfifo_faststateUPqlen1000link/ether00:0c:29:9b:7d:d6brdff:ff:ff:ff:ff:ffinet10.10.10.11/24brd10.10.10.255scopeglobaleth0valid_lftforeverpreferred_lftforeverinet6fe80::20c:29ff:fe9b:7dd6/64scopelinkvalid_lftforeverpreferred_lftforever4:virbr0:<NO-CARRIER,BROADCAST,MULTICAST,UP>mtu1500qdiscnoqueuestateDOWNqlen1000link/ether52:54:00:f4:24:05brdff:ff:ff:ff:ff:ffinet192.168.122.1/24brd192.168.122.255scopeglobalvirbr0valid_lftforeverpreferred_lftforever5:virbr0-nic:<BROADCAST,MULTICAST>mtu1500qdiscpfifo_fastmastervirbr0stateDOWNqlen1000link/ether52:54:00:f4:24:05brdff:ff:ff:ff:ff:ff