what has 'yum update' done?

[Reindl Harald]

Am 08.07.2013 17:47, schrieb D. Hugh Redelmeier:
> | > if you follow this guides *strictly* and willing to learn to deal
> | > wtih "package-cleanup --leaves | --problems | --orphans and
> | > to understand how your OS basically works you are fine
> | > http://fedoraproject.org/wiki/Upgrading_Fedora_using_yum
> 
> This may well work.  But the effort of learning this technique and
> gaining confidence in it is pretty expensive if you are only
> maintaining one or two systems.  If you can amortize that effort over
> a bunch of systems, why would you not instead use kickstart and
> centrally designed configurations?

why should i bother with kickstart and centrally configurations
if i have a ton of production machines with *highly* customized
configurations on top of a virtualization cluster where a
yum dist-upgrade takes 3-5 minutes and 30 sencods for the
reboot and works like a charm since many years?

hence i install machines once and migrate them to new
hardware every few years and even the few physical
development machines are yum-upgraded within 30 minutes

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