Very strange and as you suggested delete the ifcfg-eth0 file and recreate, specify your settings. I suspect your wireless device and or systemboard is faulty. Is there a BIOS hardware self-test you could perform to check the integrity of your hardware? On Sun, Feb 9, 2020, at 8:10 AM, Nicolas Kovacs wrote: > Hi, > > I've done my fair share of CentOS 7 installations, but this is the first time I > have this kind of weird problem. Here goes. > > In my office I have a battered Dell Optiplex 320 PC with two NICs that I'm > using as a bare metal sandbox server for testing purposes. > > The CentOS 7 installer sees the connected network card as eth0. But after the > first reboot, the interface comes up as eth1. > > My first reflex was to rename ifcfg-eth0 to ifcfg-eth1 and edit it accordingly. > Weirdly enough, on the subsequent reboot the interface comes back as eth0. > > I took a peek in /etc/udev/rules.d to see if there was any persistent interface > definition, but the directory is empty. > > On a side note, I installed Ubuntu Server 16.04 LTS on that same machine and > got the exact same problem. Debian installer sees the main network interface as > eth0, but on the first reboot the interface comes back as eth1. > > Any suggestions ? > > Niki > > -- > Microlinux - Solutions informatiques durables > 7, place de l'église - 30730 Montpezat > Site : https://www.microlinux.fr > Mail : info at microlinux.fr > Tél. : 04 66 63 10 32 > Mob. : 06 51 80 12 12 > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos > Salim