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Old 01-09-2008, 11:03 AM   #1
deadlock
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Redhat ES 4 and CentOS


I am currently trying to sort some issues with a Redhat ES 4 (RHEL4) server and wondering whether CentOS could be the solution to our problem.

For various historical reasons, most to do with cash, it was decided to leave our RHEL4 as was when the years subscription to RHN ran out. Up until now this has not caused any problems.

Recently out hardware guys have required that we put HP System Insight onto the Linux server - however on trying to install the software I am told that it needs the following:

rpm-build
rpm-devel
kernel source (can't remember version)

We have rpms for rpm-build and rpm-devel, but for earlier an earlier version of rpm than is installed. The same is true for the Kernel source.

One option is to renew with RHN and get up-to-date. A second option is to change the servers to Windows (the HW guys preference). I was wondering if CentOS is a third option?

Can I download rpms (or install yum - as suggested here:
[HTML]http://wiki.centos.org/HowTos/PackageManagement/YumOnRHEL[/HTML])
from CentOS and be OK?
 
Old 01-09-2008, 11:05 AM   #2
acid_kewpie
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yes, they'll be fine. they are, as you're probably aware, the very same packages, but without support or pretty pictures, at the binary level they really should just drop right in there. It can be a slippery slope here, in that if you do install yum, and do updates through it, you'll find that one day it will just become centos itself. (despite most underlying packages being the original rhel ones still) this is when the centos-release package gets installed, replacing the redhat-release one, with associated graphics and such. the system is still going to work as you expected of course...
 
Old 01-09-2008, 11:22 AM   #3
deadlock
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THat's what I thought from what I was reading...

Looking through the yum setup it's a bit complicated for our needs/skill

I'd rather (at the moment) just update the files that need to be upgraded in order to install HP SIM, so that's rpm-build and rpm-devel - should I be able to get those rpms from the mirrors - or will I need to download the isos?

And am I better getting the kernel source from kernel.org? We're running 2.6.9-42 I think
 
Old 01-09-2008, 11:44 AM   #4
acid_kewpie
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yeah those should be available without much problem. you would want to take a LOT of care to make sure you have the exact same version. if you update something like RPM itself, you'll very often spiral off into a vast range of dependencies. personally i'd just be googling for the rpm sub version (which is consistent across to centos)
 
Old 01-09-2008, 11:50 AM   #5
deadlock
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Thanks

The rpms seem to install fine. Having some problem with the kernel-devel package as it installs, but is slightly different to the installed version

installed: 2.6.9-42.0.2.ELsmp for i686

found: 2.6.9-42.EL.i686

Will keep looking.
 
Old 01-09-2008, 11:52 AM   #6
acid_kewpie
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rght well you wouldn't want the non-smp source even if you are on a single CPU system is you're running the smp anyway.
 
Old 01-10-2008, 08:01 AM   #7
deadlock
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Cheers for the help - got that server patched up as much as I can and HP SIM seems to be happy.

One last question (as there was one driver that needed RH 4.5)... How feasible is it to upgrade from RHEL4.4 to CentOS 4.5?

Can I just download the CentOS isos, burn the CDs, boot and relax? I don't think we're in a position to upgrade to CentOS 5 at the moment, but would the same be true?

Cheers

Dan
 
Old 01-10-2008, 08:19 AM   #8
acid_kewpie
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yes, but you should also be fine to just install the centos-release for that version, and the matching centos yum repos data (not sure what the package name actually is there.. *might* be the release file again actually) and do a "yum update" and off it'll go.
 
  


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