Re: [PLUG] Endian firewall - was Swapping motherboards

On March 31, 2016 7:44:46 AM EDT, "Eric H. Johnson" <ejohnson@camalytics.com> wrote:
All,

Any Endian firewall gurus? Per below, I replaced the motherboard in my
Endian firewall, which runs RHEL. I tried to do a recovery from the original
media, but that package does not seem to provide a recovery option.

So no great loss, I have the weekly backups. I reloaded from the original
2.5.1 install CD, and could talk to it over the green network connected to
the native LAN port on the Atom motherboard. I also have a two port PCI LAN
adapter for the other two legs, which is unchanged after swapping
motherboards, so the only LAN adapter with a different MAC address is the
one on the motherboard.

I had no problems restoring the configuration from the backup, however after
I do I can no longer talk to the firewall on any LAN port. Where, for
instance, is the interfaces file that is under /etc/network on Debian
systems?

Any other ideas?

Thanks,
Eric



Hello, Eric.

You'll want to boot from the install media into rescue mode.  That will give
a root prompt with the on-disk system mounted under the /mnt/sysimage/
directory.  You should then be able to run something like:

# chroot /mnt/sysimage/
# grub2-install

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/htm
l/Installation_Guide/sect-rescue-mode.html#sect-rescue-reinstall-grub2

Cheers.

On Tue 03/29/16 10:49AM EDT, Eric H. Johnson wrote:
 All,
 
  
 
 I had an Atom motherboard die and replaced it with a slightly later 
 Atom board, both dual core and only slightly different in 
 specifications. When I try to boot
with the new board Grub 2 gives an 
 error to the effect
 
  
 
 mkrootdev UUID .  Not found
 
  
 
 Followed by a bunch of mount errors. The boot device is a SATA SSD. Is 
 it the fact that the UUID of the SATA port has changed? Can I replace 
 it with the current UUID, and where would I find it?
 
  
 
 The OS is RHEL, not that it ever gets that far.
 
  
 
 Thanks,
 
 Eric
 
  
 





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