topic Re: Migrate from unix 10.20 to 11.0 on new hardware in Operating System - HP-UX

Migrate from unix 10.20 to 11.0 on new hardware

Theo Thomas_1 — Thu, 02 Dec 1999 07:44:46 GMT

We have a pre-installed Unix 11 system(64bit) on a N4000.
Our current productive environment is Unix 10.20 on a K370.
I would like to know what system files (like etc/hosts,etc/group, printer defs
etc)I should examine or copy from the K370 to the N4000 and how so the N4000
can become the new production environment.

Re: Migrate from unix 10.20 to 11.0 on new hardware

Neil Gast_1 — Thu, 02 Dec 1999 08:01:19 GMT

That's not such an easy question to answer. There are the standard files like
/etc/passwd, /etc/group/, etc. that should probably be copied over, but beyond
that you'll need to do some deep thinking. Consider the following questions:
(1) In what ways is the old machine acting as a server? (NIS? NFS? Print?
Sendmail? DNS?) Your new machine will need to serve the same things, so will
need the appropriate config files, etc.
(2) In what ways is the old machine a client of some other machine's server
process?
(3) What special-purpose or non-standard applications are running on the old
machine?

Look at files like /etc/services, /etc/rpc, /etc/protocols, and all of the
files under the /etc/rc.config.d directory. One can get a pretty good idea of a
machines functionality from examining these files.

I would recommend changing one aspect at a time, starting with the basic OS
configuration first, then handle any applications later. Test each change from
an appropriate client machine as you go.

It doesn't always make sense to simply copy files from one server to another,
especially if the hardware and OS environments differs. You should probably
limit your copying to the passwd and group files, then address each other issue
individually.

Good luck.
MrNeil

Re: Migrate from unix 10.20 to 11.0 on new hardware

Kevin Sharpley — Thu, 02 Dec 1999 09:15:08 GMT

Another option that you might consider is to upgrade the 10.20 machine to the
same level of OS as the nclass box. At that point you could use make_recovery
to install the nclass: Create a make_recovery tape of
the kclass and install it to the nclass. You will have to go into the
interactive mode and the os on the kclass should be the latest 64 bit 11.0
operating system. The kclass box will have to have the ability to support 11.0
64bit.

The latest ignite/ux will need to be installed on the kclass after it is at
11.0 64 bit.

Re: Migrate from unix 10.20 to 11.0 on new hardware

Anthony Goonetilleke_1 — Thu, 02 Dec 1999 16:13:59 GMT

Personally I would look at running the two envirenments in parallel for awhile
once you have migrated just incase there are any problems.

These are some of the things I would do if I was in your situation.

- do a "swlist -l product | grep -v PH" on both machines and make sure the
target machine is indentical or very close to the source machine.
- install any third party apps these are usually located in /opt
- check places like /usr/local/bin for gnu and other products/utilities that
you might need to copy over.
- Check the startup/shutdown configurations i.e
/etc/rc.config.d
/sbin/init.d
/sbin/rc*.d
This can be a bit tedious but if you start of by checking /sbin/init.d and
looking for anything missing i.e ns-httpd, oracle, omni, this will give you an
indication of any of the apps that you are missing.
- You can basically move all files like
/etc/passwd
/etc/hosts
/etc/groups
/etc/services
with only a few modifications.
- If you are keeping the same IP make sure you change /etc/rc.config.d/netconf
- Check all nfs shares i.e /etc/exports
- User homedirectories will have to be moved across to match the new
/etc/passwd

The list goes on and on but basically you will soon find out if something is
different, sadly there is no magic button to do this.

hope the info helps,
regards,
AG