centos把网卡名称修改为eth0的方法

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centos 把网卡名称修改为 eth0

默认网卡名称是 eno16777736

1、修改配置文件 ifcfg-eno16777736

[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# vim ifcfg-eno16777736

将 NAME 和 DEVICE 修改为 eth0

TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
NAME=eth0
UUID=0fea6de7-54d9-4a8d-bddc-3061678e8a0e
DEVICE=eth0
ONBOOT=yes
PEERDNS=yes
PEERROUTES=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes

重命名该文件

mv ifcfg-eno16777736 ifcfg-eth0

2、禁用该可预测命名规则

在 grup 文件里面的 GRUB_CMDLINE_LINUX 变量添加 net.ifnames=0 biosdevname=0

[root@localhost network-scripts]# vim /etc/default/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="crashkernel=auto net.ifnames=0 biosdevname=0 rhgb quiet"
GRUB_DISABLE_RECOVERY="true"

运行命令重新生成GRUB配置并更新内核参数

[root@localhost network-scripts]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-327.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-327.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-692c580a413f41d8b51ddc4724500560
Found initrd image: /boot/initramfs-0-rescue-692c580a413f41d8b51ddc4724500560.img
done

3、重启系统

[root@localhost network-scripts]# reboot now

查看网卡信息

[root@localhost network-scripts]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
    inet 192.168.81.128 netmask 255.255.255.0 broadcast 192.168.81.255
    inet6 fe80::20c:29ff:fe5b:1a46 prefixlen 64 scopeid 0x20<link>
    ether 00:0c:29:5b:1a:46 txqueuelen 1000 (Ethernet)
    RX packets 474 bytes 41909 (40.9 KiB)
    RX errors 0 dropped 0 overruns 0 frame 0
    TX packets 266 bytes 45987 (44.9 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 0 (Local Loopback)
    RX packets 6 bytes 564 (564.0 B)
    RX errors 0 dropped 0 overruns 0 frame 0
    TX packets 6 bytes 564 (564.0 B)
    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
    inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
    ether 00:00:00:00:00:00 txqueuelen 0 (Ethernet)
    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

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