CentOS7 删除virbr0虚拟网卡

在CentOS 7的安装过程中如果有选择相关虚拟化的的服务安装系统后，启动网卡时会发现有一个以网桥连接的私网地址的virbr0网卡，这个是因为在虚拟化中有使用到libvirtd服务生成的，如果不需要可以关闭后去掉：

brctl show
#查看网桥状态

brctl delif <网桥名> <端口名>
#卸载网桥上的端口

ifconfig
#查看是否有网桥网卡名

ifconfig <网桥名> down
#关闭此网卡

brctl delbr <网桥名>
#删除网桥

systemctl disable libvirtd.service
#禁止开机自启动

配置实例：

[root@B06 ~]# 
[root@B06 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
virbr0          8000.5254007dad83       yes             virbr0-nic
[root@B06 ~]# 
[root@B06 ~]# brctl delif virbr0 virbr0-nic
[root@B06 ~]# 
[root@B06 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
virbr0          8000.000000000000       yes
[root@B06 ~]# 
[root@B06 ~]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 0c:da:41:1d:49:d2 brd ff:ff:ff:ff:ff:ff
    inet 10.183.48.127/22 brd 10.153.51.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::270f:ed7:e55c:1130/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 0c:da:41:1d:95:c3 brd ff:ff:ff:ff:ff:ff
    inet 172.16.10.113/16 brd 172.16.255.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::bab4:bacc:e3ab:bef4/64 scope link 
       valid_lft forever preferred_lft forever
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
5: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ether 52:54:00:7d:ad:83 brd ff:ff:ff:ff:ff:ff
[root@B06 ~]# ifconfig virbr0 down
[root@B06 ~]# 
[root@B06 ~]# brctl delbr virbr0
[root@B06 ~]# 
[root@B06 ~]# systemctl disable libvirtd.service
Removed symlink /etc/systemd/system/multi-user.target.wants/libvirtd.service.
Removed symlink /etc/systemd/system/sockets.target.wants/virtlockd.socket.
Removed symlink /etc/systemd/system/sockets.target.wants/virtlogd.socket.
[root@B06 ~]#