[CentOS] No network on cloned CentOS 7 installation

[Robert Heller]

At Fri, 3 May 2019 18:48:30 +0200 CentOS mailing list <centos at centos.org> wrote:

> 
> Hi,
> 
> I have a few identical Dell Optiplex 7010 machines that I want to use
> for our school's computer room. I tried to clone these installations
> (like I did before on CentOS 5 and various versions of Slackware), but
> this time I ran into a problem.
> 
> Here's what I did.
> 
> 1. Install one computer and zero unused hard disk sectors with dd.
> 
> 2. Send the image to a local FTP server using G4L (Ghost4Linux).
> 
> 3. Fetch the image on another computer.
> 
> 4. Boot the new computer in rescue mode and change the hardcoded
> /etc/hostname to a new value.
> 
> Let me add that I removed all hardcoded MAC addresses from
> /etc/sysconfig/ifcfg-em1, which has only very limited information in it.

I think you need to re-code each machine's MAC address into ifcfg-em1.

> 
> What else could cause the network to choke on a cloned installation?
> 
> Cheers,
> 
> Niki

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