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Re: Linux-to-Linux migration



Hugh E Cruickshank wrote:
Hi All:

We have a client that has been experiencing some hardware problems
which have resulted in a corruption of the OS (RHEL3). They are
planning on replacing the system drive and reinstalling the RHEL.
I know that I will need to backup a lot of information from the
current system prior to it being replaced. I have spent some time
searching for information on Linux-to-Linux migration but have not be able to find much (tons on Windows-to-Linux migration).

My question is: Does anyone have any links to any documents on
Linux-to-Linux migration or Linux upgrading that might assist
me in ensure as some a transition for the client as possible?
I am not looking for handholding just some guidelines and/or
checklists of things to do.

TIA

Regards, Hugh

Not sure about any documentation but as a guideline I can tell you this:

1. Mistakes are not tolerated (this should ease the pressure a little :) )
1.5 Take some time in checking out the server and the business (if you haven't done that already). This includes asking your client all questions regarding the services provided by the server. You're not living in Oz therefore you cannot guess or spend useless time in checking every file on the server. 2. Identify all services used (like DNS, SMTP and all). Check what services are started at boot-time. Import data from step 1.5 to help you on the way.
3. Identify all the products of those services (usually files)
4. Identify all configurations of those services. Check them out, if you see new products goto step 3. If you see new services goto step 2. 5. Agree with the client on the back-ups you will make. This step is useful not in the way you're getting permission from him as to what to back-up but he might tell you that part of what you're trying to back-up is of no use to him anymore. Might shorten the back-up time if you're lucky. 5. Take some time-off from your girlfriend and put aside some money for a new bracelet and using all the notes from the previous steps proceed to back-up stage. Back-up products and configurations also.
6. Double-check if you have backed up everything


You might want to consider sharing with this list output of step 2 especially if you're not feeling to sure about a particular service. There are some very good technicians on this list that *will* get you on the right track. What I can tell you is that I followed these steps a few times before mostly because of hardware upgrading and got me on the shore just well. The client was happy and the girlfriend ecstatic about the new bracelet. :) Oh, and one more thing. Didn't quite understand if the server is down or still limping to its death but you might want to consider ways to decrease the downtime if not for all but at least for a few crucial services. This might get you a white ball from your client. Still, he needs to know to appreciate it ;) .

Good luck



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