vi /etc/default/grub GRUB_CMDLINE_LINUX="rhgb quiet" 에서 quiet 뒤에 아래의 두가지 옵션을 추가해 준다. GRUB_CMDLINE_LINUX="rhgb quiet net.ifnames=0 biosdevname=0" grub2-mkconfig -o /boot/grub2/grub.cfg mv /etc/sysconfig/network-scripts/ifcfg-ens33 /etc/sysconfig/network-scripts/ifcfg-eth0 sed -i "s/ens33/eth0/g" /etc/sysconfig/network-scripts/ifcfg-eth0