centos7 网卡重命名

centos7默认服务器网卡名称，如下图：

[root@localhost ~]# ifconfig 
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.160  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::250:56ff:fe37:a950  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:37:a9:50  txqueuelen 1000  (Ethernet)
        RX packets 335  bytes 33930 (33.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 210  bytes 23175 (22.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 24  bytes 2920 (2.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 24  bytes 2920 (2.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

　　修改linux网卡名称为传统的eth开头，如下图：

[root@localhost ~]# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.112  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::20c:29ff:fe4b:66b  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:4b:06:6b  txqueuelen 1000  (Ethernet)
        RX packets 71  bytes 7624 (7.4 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 63  bytes 8717 (8.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

　　

修改网卡名称方法步骤如下：

第一步：编辑/etc/sysconfig/grub文件或者/etc/default/grub文件，再倒数第二行quit后面添加如下代码：

net.ifnames=0  biosdevname=0

[root@localhost ~]# cat /etc/sysconfig/grub 
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet net.ifnames = 0 biosdevname = 0 "
GRUB_DISABLE_RECOVERY="true"　

第二步：执行命令,grub2-mkconfig -o /boot/grub2/grub.cfg，生产新的grub.cfg文件。

[root@localhost ~]#grub2-mkconfig -o /boot/grub2/grub.cfg

第三步：修改网卡配置文件

[root@localhost ~]# cd  /etc/sysconfig/network-scripts/
[root@localhost ~]# mv  ifcfg-ens33  ifcfg-eth0 
DEVICE=eth0
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 
DEVICE=eth0
IPADDR=192.168.0.112
PREFIX=24
BROADCAST=192.168.0.255
ONBOOT=yes
NAME=eth0

　第四步：重启服务器生效

[root@localhost ~]#reboot
[root@localhost ~]# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.112  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::20c:29ff:fe4b:66b  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:4b:06:6b  txqueuelen 1000  (Ethernet)
        RX packets 243  bytes 21680 (21.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 165  bytes 20161 (19.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

　　

　选中Install CentOS 7不要回车，直接按Tab键，在行尾加入如下参数net.ifnames=0 biosdevname=0再回车进行下一步，则系统安装完成后默认网卡名称为eth模式