Linux modifies NIC name enss33 to Eth0--ubuntu16 and Centos7

The default NIC names for the newly installed Ubuntu16.04 and Centos7 are ens33. Want to change to eth0.

First, CentOS:

1. Modify/etc/sysconfig/grub file (backup before modification)
   

   Add 2 parameters (Net.ifnames=0 biosdevname=0) for the grub_cmdline_linux variable, and the modification is done as follows:
   grub_cmdline_linux= "Crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap net.ifnames=0 biosdevname=0 RHGB Quiet
   Notice that the spaces are separated before and after.

2. Rebuilding the Grub configuration file
   Execute command: Grub2-mkconfig-o/boot/grub2/grub.cfg
3. Modify/etc/sysconfig/network-scripts/ifcfg-ens33
   Modify the file name to Ifcfg-eth0
   Open the file and modify the name and device parameters to eth0.
4. Rebooting the system
5. Ifconfig, the discovery has been modified to complete

Second, Ubuntu

1. Vim/etc/default/grub
   grub_cmdline_linux= "net.ifnames=0 biosdevname=0" (as in the first step above, add these two parameters)
2. Rebuilding the Grub configuration file
   Execute command: Grub2-mkconfig-o/boot/grub2/grub.cfg
3. There are some places on the Internet to modify the/etc/network/interfaces file, I do not change here. (There is only one Lo address)
4. Rebooting the system
5. Ifconfig, the discovery has changed to complete

Linux modifies NIC name enss33 to Eth0--ubuntu16 and Centos7