CentOS把em1网卡还原为eth0网卡

第一步：修改系统grub

vi /boot/grub/grub.conf

增加一个 biosdevname=0 的启动参数即可

cat /boot/grub/menu.lst 
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You do not have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /, eg. biosdevname=0
#          root (hd0,2)
#          kernel /boot/vmlinuz-version ro root=/dev/sda3 biosdevname=0
#          initrd /boot/initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,2)/boot/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.32-431.3.1.el6.x86_64)
        root (hd0,2)
        kernel /boot/vmlinuz-2.6.32-431.3.1.el6.x86_64 ro root=UUID=d3664645-7f06-4a26-aa2c-34ece0a4c229 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet biosdevname=0
        initrd /boot/initramfs-2.6.32-431.3.1.el6.x86_64.img

第二步：删除udev的配置文件

rm -f /etc/udev/rules.d/70-persistent-net.rules

注：第二步可以不需要操作。

第三步：修改当前网卡配置文件的名称
mv ifcfg-em1 ifcfg-eth0
mv ifcfg-em2 ifcfg-eth1
第四步：修改网卡配置文件内容，把em1全部修改改为eth0

#cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=”eth0″
第五步：重新启动系统 reboot

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