Centos changes the NIC name to eth0 and centoseth0.

Centos changes the NIC name to eth0 and centoseth0.

The default Nic name is eno16777736.

1. modify the configuration file ifcfg-eno16777736

[root@localhost ~]# cd /etc/sysconfig/network-scripts/[root@localhost network-scripts]# vim ifcfg-eno16777736

Change NAME and DEVICE to eth0

TYPE=EthernetBOOTPROTO=dhcpDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noNAME=eth0UUID=0fea6de7-54d9-4a8d-bddc-3061678e8a0eDEVICE=eth0ONBOOT=yesPEERDNS=yesPEERROUTES=yesIPV6_PEERDNS=yesIPV6_PEERROUTES=yes

Rename this file

mv ifcfg-eno16777736 ifcfg-eth0

2. disable this predictable naming rule.

Add net. ifnames = 0 biosdevname = 0 to the grub_javasline_linux variable in the grup file.

[root@localhost network-scripts]# vim /etc/default/grubGRUB_TIMEOUT=5GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"GRUB_DEFAULT=savedGRUB_DISABLE_SUBMENU=trueGRUB_TERMINAL_OUTPUT="console"GRUB_CMDLINE_LINUX="crashkernel=auto net.ifnames=0 biosdevname=0 rhgb quiet"GRUB_DISABLE_RECOVERY="true"

Run the command to regenerate GRUB configuration and update kernel parameters.

[root@localhost network-scripts]# grub2-mkconfig -o /boot/grub2/grub.cfgGenerating grub configuration file ...Found linux image: /boot/vmlinuz-3.10.0-327.el7.x86_64Found initrd image: /boot/initramfs-3.10.0-327.el7.x86_64.imgFound linux image: /boot/vmlinuz-0-rescue-692c580a413f41d8b51ddc4724500560Found initrd image: /boot/initramfs-0-rescue-692c580a413f41d8b51ddc4724500560.imgdone

3. restart the system

[root@localhost network-scripts]# reboot now

View Nic Information

[root@localhost network-scripts]# ifconfigeth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500        inet 192.168.81.128  netmask 255.255.255.0  broadcast 192.168.81.255        inet6 fe80::20c:29ff:fe5b:1a46  prefixlen 64  scopeid 0x20<link>        ether 00:0c:29:5b:1a:46  txqueuelen 1000  (Ethernet)        RX packets 474  bytes 41909 (40.9 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 266  bytes 45987 (44.9 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536        inet 127.0.0.1  netmask 255.0.0.0        inet6 ::1  prefixlen 128  scopeid 0x10