Centos 7.0 Nic configuration and rename tutorial

Centos 7.0 Nic configuration and rename tutorial
After centos 7.0 is installed, the NIC is disabled by default, and the NIC name is changed. In centos 5 and earlier, the network card was named eth0 eth1. In the centos 6 era, the network card name changed to em1 em2, the bigger change appeared in the centos 7 era, and the NIC name changed directly to ens192 eno12312. The following describes how to configure the centos 7.0 Nic.
After the system is installed, enter the NIC configuration folder.

Here we can see that my Nic name is currently ifcfg-ens192
The last few lines of the vi ifcfg-ens192 are the configuration files you need to add yourself

 
 

  
  
HWADDR = 00: 50: 56: bf: 00: 25
 
  
  
TYPE = Ethernet

  
  
BOOTPROTO = static # enable static IP addresses

  
  
DEFROUTE = yes

  
  
PEERDNS = yes

  
  
PEERROUTES = yes

  
  
20174_failure_fatal = no

  
  
IPV6INIT = yes

  
  
IPV6_AUTOCONF = yes

  
  
Required 6_defroute = yes

  
  
IPV6_PEERDNS = yes

  
  
20176_peerroutes = yes

  
  
20176_failure_fatal = no

  
  
NAME = ens192

  
  
UUID = ae0965e7-22b9-45aa-8ec9-3f0a20a85d11

  
  
ONBOOT = yes # enable automatic network connection to enable startup. Remember to modify

  
  
IPADDR0 = 10.0.0.101 # Set the IP address

  
  
PREFIXO0 = 24 # Set the subnet mask

  
  
GATEWAY0 = 10.0.0.1 # Set the Gateway

  
  
DNS1 = 202.102.152.3 # Set primary DNS

  
  
DNS2 = 202.102.128.68 # Set the backup DNS. Here I write the dns server in Jinan. You can enter it as needed.

 
 

Save and exit.
Restart the NIC. Here you can use service network restart or the new centos7 command systemctl restart network. service.
Finally, check the NIC information and run the command systemctl status network. status.


Of course, the NIC name can be modified as needed, and can be changed to eth0 em1.
Edit the/etc/sysconfig/grub file and add "net. ifnames = 0 biosdevname = 0"


Run: grub2-mkconfig-o/boot/grub2/grub. cfg

Rename the file
Mv/etc/sysconfig/network-scripts/ifcfg-ens192/etc/sysconfig/network-scripts/ifcfg-eth0

Change the NAME = ens192 in the configuration file to the same NAME as above = eth0.
After the configuration is complete, restart the system and view the NIC configuration information ifocnfig