centos 把网卡名称修改为 eth0

时间：2023-03-09 07:29:08
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

如果不启动 dhcp，则可以设置静态 ip 配置

TYPE=Ethernet

DEVICE=eth0

ONBOOT=yes  #系统启动时是否自动加载

BOOTPROTO=static  #启用地址协议 --static:静态协议 --bootp协议 --dhcp协议

IPADDR=192.168.81.128

NETMASK=255.255.255.0

GATEWAY=192.168.81.2

DNS1=192.168.81.2

HWADDR=:0C:::5D:

BROADCAST=192.168.81.255

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=

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.-.el7.x86_64

Found initrd image: /boot/initramfs-3.10.-.el7.x86_64.img

Found linux image: /boot/vmlinuz--rescue-692c580a413f41d8b51ddc4724500560

Found initrd image: /boot/initramfs--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=<UP,BROADCAST,RUNNING,MULTICAST>  mtu

        inet 192.168.81.128  netmask 255.255.255.0  broadcast 192.168.81.255

        inet6 fe80::20c:29ff:fe5b:1a46  prefixlen   scopeid 0x20<link>

        ether :0c::5b:1a:  txqueuelen   (Ethernet)

        RX packets   bytes  (40.9 KiB)

        RX errors   dropped   overruns   frame

        TX packets   bytes  (44.9 KiB)

        TX errors   dropped  overruns   carrier   collisions 

lo: flags=<UP,LOOPBACK,RUNNING>  mtu

        inet 127.0.0.1  netmask 255.0.0.0

        inet6 ::  prefixlen   scopeid 0x10<host>

        loop  txqueuelen   (Local Loopback)

        RX packets   bytes  (564.0 B)

        RX errors   dropped   overruns   frame

        TX packets   bytes  (564.0 B)

        TX errors   dropped  overruns   carrier   collisions 

virbr0: flags=<UP,BROADCAST,MULTICAST>  mtu

        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255

        ether :::::  txqueuelen   (Ethernet)

        RX packets   bytes  (0.0 B)

        RX errors   dropped   overruns   frame

        TX packets   bytes  (0.0 B)

        TX errors   dropped  overruns   carrier   collisions

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