CentOS 7下修改默认网卡名为eth0的两种方法

• CentOS7默认的网卡名称是和设备名称是随机的
• 如果要修改网卡名称以eth开头，有两种方式

第一种方式

• 这种方式适合在安装操作系统的时候进行设置

1、点击 Tab，打开kernel启动选项

2、增加内核参数： net.ifnames=0 biosdevname=0

3、输入完成之后回车正常安装操作系统就好了

第二种方式

1、修改网卡配置文件中的 DEVICE= 参数的关于 eth0

[root@ansheng ~]# cd /etc/sysconfig/network-scripts/
[root@ansheng network-scripts]# vi ifcfg-eno16777728
TYPE=Ethernet
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=eno16777728
UUID=8a3eade8-005c-46df-81f2-6e2598457bac
#DEVICE=eno16777728
DEVICE=eth0
ONBOOT=yes

2、网卡配置文件名称改为 ifcfg-eth0

[root@ansheng network-scripts]# mv ifcfg-eno16777728 ifcfg-eth0

3、对grub2进行修改

• 因CentOS7采用grub2引导，还需要对grub2进行修改
• 编辑 /etc/default/grub 配置文件
• 在 GRUB_CMDLINE_LINUX 这个参数后面加入 net.ifnames=0 biosdevname=0

[root@ansheng network-scripts]# vi /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="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet net.ifnames=0 biosdevname=0"
GRUB_DISABLE_RECOVERY="true"

4、用 grub2-mkconfig 命令重新生成GRUB配置并更新内核

[root@ansheng 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-4dd6b54f74c94bff9e92c61d669fc195
Found initrd image: /boot/initramfs-0-rescue-4dd6b54f74c94bff9e92c61d669fc195.img
done

5、重启系统

[root@ansheng network-scripts]# reboot

6、重启之后验证网卡名称:

[root@ansheng ~]# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
  inet 192.168.56.130 netmask 255.255.255.0 broadcast 192.168.56.255
  inet6 fe80::20c:29ff:fe6d:d894 prefixlen 64 scopeid 0x20<link>
  ether 00:0c:29:6d:d8:94 txqueuelen 1000 (Ethernet)
  RX packets 27413 bytes 38532163 (36.7 MiB)
  RX errors 0 dropped 0 overruns 0 frame 0
  TX packets 7727 bytes 702194 (685.7 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 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