Why do I have 2 of the same devices but different nicknames? Do I need to delete one? What is with this eth0.bak? Thanks for any advice. =)

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BTW, this is from RHEL virtual machine in case that helps any.

From the request below, here are some more details of my networking setup. I don't see any other indication of a eth0.bak here. Is it safe to just follow dmourati's instructions to bring down this eth0.back? Thanks again. enter image description here


Post the outputs from the following:

$ /sbin/ifconfig
$ cat /etc/sysconfig/network-scripts/ifcfg-eth0*

Probably the person modifying that ifcfg-eth0 script didn't release that copying it to ifcfg-eth0.bak would add another config to the interface.

I'd bet you want to do:

$ sudo ifcfg eth0.bak down
$ sudo rm /etc/sysconfig/network-scripts/ifcfg-eth0.bak

Don't do that until you post the ifconfig and cat outputs above so we can confirm there isn't something else going on.

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  • I've posted the commands as shown above. What do you think? Thanks for helping. =) – O_O May 13 '11 at 19:34
  • It appears that the machine or virtual machine went from being statically addressed (the .bak file: to DHCP (ifcfg-eth0 file: It also appears the MAC address has changed. As long as you are okay with the DHCP address and can access the machine, go ahead and delete ifcfg-eth0.bak. You can skip the ifcfg eth0.bak step as it doesn't appear to be running. I'd reboot the system and try logging in via SSH to – dmourati May 13 '11 at 20:08

Someone made a ifcfg-eth0.bak file in


Its probably a backup file

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That's a backup file. It happens when you, for example, change the network card (hence, it's MAC ADDRESS).

Red Hat based distros happen to create a .bak file when that happens.

It's safe to delete.

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