How to modify the network card em1 to eth0 in CentOS

Problem:

After installing the Linux operating system, some Dell servers find that the nic name has changed to em1.

Solution:

Change the nic name to eth0. The CentOS Operating system is used as an example.

1. Modify the grub system

Vi/boot/grub. conf # Add biosdevname = 0 to the kernel parameter

Kernel/vmlinuz-2.6.32-573.7.1.el6.x86_64 ro root =/dev/mapper/VolGroup-lv_root kernel LANG = en_US.UTF-8 rd_NO_MD kernel = VolGroup/lv_swap SYSFONT = latarcyrheb-sun16 crashkernel = auto kernel = VolGroup/lv_root KEYBOARDTYPE = pc KEYTABLE = us rd_NO_DM biosdevname = 0 rhgb quiet

: Wq! # Save and exit

2. Modify the Nic naming rule configuration file of udev

Vi/etc/udev/rules. d/70-persistent-net.rules # Modify

This server has four NICs. The identified NICs are: em1, em2, em3, and em4 (the em code starts from 1 and does not have em0 ),

Modify em1 to eth0, em2 to eth1, em3 to eth2, and em4 to eth3.

: Wq! # Save and exit

3. Modify the name of the current Nic configuration file

Cd/etc/sysconfig/network-scripts/# enter the Nic configuration file directory

Mv ifcfg-em1 ifcfg-eth0 # Rename

Mv ifcfg-em2 ifcfg-eth1

Mv ifcfg-em3 ifcfg-eth2

Mv ifcfg-em4 ifcfg-eth3

4. Modify the content of the NIC configuration file and change em to eth.

Cd/etc/sysconfig/network-scripts/# enter the Nic configuration file directory

Vi ifcfg-eth0 # modify em1 inside to eth0

Vi ifcfg-eth1 # modify em2 inside to eth1

Vi ifcfg-eth2 # modify em3 inside to eth2

Vi ifcfg-eth3 # modify em4 inside to eth3

: Wq! # Save and exit after modification

5. Restart the system to make the above changes take effect.

Shutdown-r now # Restart