centos把网卡名称修改为eth0的方法

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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