Change the default network interface name to “eth0” (CentOS7)

$ sudo yum install net-tools

$ sudo vi /etc/default/grub

GRUB_TIMEOUT=5

GRUB_DEFAULT=saved

GRUB_DISABLE_SUBMENU=true

GRUB_TERMINAL_OUTPUT="console"

GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet"

GRUB_DISABLE_RECOVERY="true"

==>

GRUB_TIMEOUT=5

GRUB_DEFAULT=saved

GRUB_DISABLE_SUBMENU=true

GRUB_TERMINAL_OUTPUT="console"

GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet net.ifnames=0 biosdevname=0"

GRUB_DISABLE_RECOVERY="true"

$ sudo grub2-mkconfig -o /boot/grub2/grub.cfg

$ sudo cd /etc/sysconfig/network-scripts/

$ sudo cp ifcfg-enp0s3 ifcfg-eth0

$ sudo cp ifcfg-enp0s8 ifcfg-eth1

$ sudo vi ifcfg-eth0 (ifcfg-eth1도 수정)

TYPE="Ethernet"

BOOTPROTO="static"

DEFROUTE="yes"

PEERDNS="yes"

PEERROUTES="yes"

IPV4_FAILURE_FATAL="no"

IPV6INIT="no"

IPV6_AUTOCONF="no"

IPV6_DEFROUTE="no"

IPV6_PEERDNS="no"

IPV6_PEERROUTES="no"

IPV6_FAILURE_FATAL="no"

NAME="enp0s3"

UUID="c021a6c7-e426-49e3-be9a-80f745121585"

DEVICE="enp0s3"

ONBOOT="yes"

IPADDR="10.0.2.6"

NETMASK="255.255.255.0"

GATEWAY="10.0.2.1"

DNS1="8.8.8.8"

DNS2="8.8.4.4"

==>

TYPE="Ethernet"

BOOTPROTO="static"

DEFROUTE="yes"

PEERDNS="yes"

PEERROUTES="yes"

IPV4_FAILURE_FATAL="no"

IPV6INIT="no"

IPV6_AUTOCONF="no"

IPV6_DEFROUTE="no"

IPV6_PEERDNS="no"

IPV6_PEERROUTES="no"

IPV6_FAILURE_FATAL="no"

NAME="eth0"

UUID="c021a6c7-e426-49e3-be9a-80f745121585"

DEVICE="eth0"

ONBOOT="yes"

IPADDR="10.0.2.6"

NETMASK="255.255.255.0"

GATEWAY="10.0.2.1"

DNS1="8.8.8.8"

DNS2="8.8.4.4"

#$ sudo systemctl stop NetworkManager 

#$ sudo systemctl disable NetworkManager

#$ sudo vi /etc/resolv.conf

#$ sudo service network restart

$ sudo lsmod | grep ipv6

$ sudo vi /etc/default/grub

GRUB_TIMEOUT=5

GRUB_DEFAULT=saved

GRUB_DISABLE_SUBMENU=true

GRUB_TERMINAL_OUTPUT="console"

GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap net.ifnames=0 biosdevname=0"

GRUB_DISABLE_RECOVERY="true"

==>

GRUB_TIMEOUT=5

GRUB_DEFAULT=saved

GRUB_DISABLE_SUBMENU=true

GRUB_TERMINAL_OUTPUT="console"

GRUB_CMDLINE_LINUX="ipv6.disable=1 rd.lvm.lv=centos/root rd.lvm.lv=centos/swap net.ifnames=0 biosdevname=0"

GRUB_DISABLE_RECOVERY="true"

$ sudo grub2-mkconfig -o /boot/grub2/grub.cfg

$ sudo reboot