[Gllug] CentOS and RHES

Sharon Kimble skimble04 at gmail.com
Thu Oct 27 09:49:07 UTC 2005


On Thursday 27 Oct 2005 09:32, Jason Clifford wrote:
> On Thu, 27 Oct 2005, Tethys wrote:
> > >I do understand it and I'm of the opinion that it's dangerous and makes
> > >your distros unsuitable for enterprise applications.
> >
> > You still haven't explained this. Where's the danger?
>
> Let's say I am running software X. I have installed the minimum necessary
> amount of software to support this for the configuration I need and
> carried out the necessary security and stability analysis which is part of
> the documentation deemed necessary for internal support.
>
> Now you run an update process to ensure you have the latest version of
> your software - in response to a security announcement relevant to your
> setup. In doing so additional software to meet completely dependancies is
> installed without any further prompting and without any warning.
>
> That new software hasn't been included in your assessments of the system
> you are operating.
>
> > But it doesn't do that. If it did, I'd be in complete agreement
> > with you. Running "yum update" does *not* install new software,
> > unless the updated version has a new dependency. In that respect,
> > my understanding is that it behaves identically to "apt-get update".
> > Yet you seem quite happy to run that...
>
> Apt-get update will show a list of packages to be updated and in a
> separate section will show a list of any new packages to be installed in
> order to meet dependancies. It will then ask for confirmation that it's OK
> to go ahead and install them.
>
> That last step makes a difference and is not standard with yum.

I've been following this thread with interest as its developed, and now feel 
that I can contribute to it :). I'm sorry Jason, but in this respect you're 
wrong. Yum can run as a cron job and do automatic updates, and it can also be 
run from the commandline. Running from the commandline [as I do] it does 
exactly the same as you describe 'apt-get update' above. AFAIK, this method 
has been in yum for certainly the last year too.

Sharon.
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