Centos 修改默认网卡为eth0

1. 修改网卡配置文件中的 DEVICE= 参数的关于 eth0

   TYPE=Ethernet
   PROXY_METHOD=none
   BROWSER_ONLY=no
   BOOTPROTO=static
   DEFROUTE=yes
   IPV4_FAILURE_FATAL=yes
   IPV6INIT=yes
   IPV6_AUTOCONF=yes
   IPV6_DEFROUTE=yes
   IPV6_FAILURE_FATAL=no
   IPV6_ADDR_GEN_MODE=stable-privacy
   NAME=eth0
   DEVICE=eth0
   ONBOOT=yes
   IPADDR=192.168.100.43
   NETMASK=255.255.255.0
   GATEWAY=192.168.100.1
   DNS1=114.114.114.114
   ~               

2. 修改网卡文件名 mv ifcfg-eno16777728 ifcfg-eth0
   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

   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 rd.lvm.lv=centos/root rd.lvm.lv=centos/swap
   rhgb quiet net.ifnames=0 biosdevname=0"
   GRUB_DISABLE_RECOVERY="true"

3. 用 grub2-mkconfig 命令重新生成GRUB配置并更新内核

   [root@localhost ~]# 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

4. 重启 init 6