[Gllug] Back-out plans on Debian/Redhat?

[Juergen Schinker]

Khusro Jaleel wrote:
> Hi, I was reading
> 
> "The Practice of System and Network Administration"
> http://www.amazon.co.uk/Practice-System-Network-Administration/dp/0201702711
> 
> and the chapter on Change Management states that you must have a
> back-out plan in case of problems when you are making major updates to
> a system.
> 
> What I'm not sure about is for example, if I have a critical
> Debian-based webserver which has a lot of updates due (Apache, Mysql,
> Kernel, Libc, etc) how do I implement a back-out plan for
> dist-upgrades in case there are problems?

You should definitely think about Virtualisation..

as I prefer Xen i recommend it despite the recent turbulences

once virtualised you can start a cloned copy e.g. on the same machine

once successfull you can do the same with the live one

Xen is also very fast and imho VMware sucks
-- 
Gllug mailing list  -  Gllug at gllug.org.uk
http://lists.gllug.org.uk/mailman/listinfo/gllug