CentOS6.2修改網卡名稱

1、在grub裡增加biosdevname=0的啟動參數，形如

 

kernel /vmlinuz-2.6.32-131.21.1.el6.i686 ro root=/dev/mapper/vg_test-lv_root rd_LVM_LV=vg_test/lv_root rd_LVM_LV=vg_test/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latar

cyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet biosdevname=0

步驟：

首先cd /etc/sysconfig/network-scripts或者vi /boot/grub/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/sda2
#          initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.32-220.17.1.el6.x86_64)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-220.17.1.el6.x86_64 ro root=UUID=41d8fd59-98cb-44fa-9cfb-065c104feaf0 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD quiet SYSFONT=latarc
yrheb-sun16 rhgb crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM
biosdevname=0
        initrd /initramfs-2.6.32-220.17.1.el6.x86_64.img
title CentOS (2.6.32-220.el6.x86_64)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-220.el6.x86_64 ro root=UUID=41d8fd59-98cb-44fa-9cfb-065c104feaf0 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD quiet SYSFONT=latarcyrheb
-sun16 rhgb crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM
biosdevname=0
        initrd /initramfs-2.6.32-220.el6.x86_64.img
添加的參數只有紅色字型的那一段，然後儲存檔案

 

2、刪除udev的設定檔rm -f /etc/udev/rules.d/70-persistent-net.rules

 

3、把網卡設定檔改名

 第三步：修改當前網卡設定檔的名稱
mv ifcfg-em1 ifcfg-eth0
mv ifcfg-em2 ifcfg-eth1
mv ifcfg-em3 ifcfg-eth2
mv ifcfg-em4 ifcfg-eth3

mv ifcfg-em1 ifcfg-eth0

 

4、把網卡設定檔內容修正，把em1的全部改成eth0

 

perl -p -i -e ‘s/em1/eth0/g’ ifcfg-eth0

 或者

修改之前：
DEVICE="em1"
NM_CONTROLLED="yes"
ONBOOT=yes
HWADDR=D4:AE:52:6A:8F:76
TYPE=Ethernet
BOOTPROTO=none
IPADDR=114.X.X.X
GATEWAY=114.X.X.X
NETMAKS=255.255.255.224
DNS1=202.106.0.20
DNS2=8.8.8.8
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
修改之後：
DEVICE="eth0"
NM_CONTROLLED="yes"
ONBOOT=yes
HWADDR=D4:AE:52:6A:8F:76
TYPE=Ethernet
BOOTPROTO=none
IPADDR=114.X.X.X
GATEWAY=114.X.X.X
NETMAKS=255.255.255.224
DNS1=202.106.0.20
DNS2=8.8.8.8
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
可以使用 perl -p -i -e 's/em1/eth0/g' ifcfg-eth0 或sed -i 's/em1/eth0/g' ifcfg-eth0 進行替換。
最後一步：重新啟動系統 init 6 啟動之後你就發現熟悉的eth0-eth4已經回來啦，順便說下centos 6.2 還有一個問題就是如果你沒有在網卡設定檔裡寫dns的話，重啟之後你就會發現 /etc/resolv.conf 檔案被清空了，一個方法就是在網卡設定檔中寫DNS，另一個方法就是給/etc/resolv.conf加i屬性，chattr +i /etc/resolv.conf

5、重啟系統即可