[CentOS] Using eth0 on desktops with single network interface

[m.roth at 5-cent.us]

Scott Robbins wrote:
> On Thu, Apr 19, 2012 at 01:22:49PM -0400, Alfred von Campe wrote:
>> On Apr 19, 2012, at 11:25, Scott Robbins wrote:
>>
>> > http://fedoraproject.org/wiki/Talk:Features/ConsistentNetworkDeviceNaming
>>
>> Removing the biosdevname RPM sounds promising, and I'll test it with a
>> kickstart install this afternoon.  However, what's the best way to fix
>> existing systems?  If I just remove the biosdevname RPM and reboot, I
>> don't think that eth0 will come up, as there is no ifcfg-eth0 script.
>> Do I have to rename the ifcfg-em1 script and fix the DEVICE name inside
>> the file?  Or is there a way to regenerate  the ifcfg-eth0 file from the
>> command line?
>>
>
> What I do is this for an existing one.
>
> I change /etc/sysconfig/network-scripts/ifcfg-whatever to ifcfg-eth0 (or
> whatever it might be, e.g., eth0 and eth1).
>
> Then, in the file itself, I edit the necessary line.  (I think it's just
> one line, I don't have one here to look at, but IIRC, it's just the one
> line that uses pc1p1 or em1 or whatever, and I change that to, for
> example, eth0).
>
> The other lines in the file should be fine--the ones referring to
> hardware address, IP, and so on.
>
> As mentioned, I rename the file.  One then removes the biosdevname
> package.  I've never gotten it working without a reboot--service network
> restart doesn't work for me--on the other hand, I think I've only run
> into it with Fedora so far.

And with all of that, do *not* forget to edit
/etc/udev/rules.d/70-persistent-net.rules

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