Re: sources.list: experimental
Am Dienstag, 2. Dezember 2008 schrieb Jochen Schulz:
> Lennart Sorensen:
> > On Tue, Dec 02, 2008 at 06:35:59PM +0100, Hans-J. Ullrich wrote:
> >> just a question:
> >>
> >> adding an experimental source to the sources list (just to install a
> >> special application from this), will an "aptitude upgrade" or "apt-get
> >> upgrade" overwrite ALL installed packages ?
> >
> > upgrade doesn't do anything involving adding or removing packages.
>
> Well, but it upgrades packages. In other words: it overwrites existing
> packages. That's what Hans asked.
>
Yes, that is exactly, what I wanted to know: does it overwrite all installed
packages with packages with higher version numbers ? ( = versions from
experimental).
> > dist-upgrade does, so really using anything other than dist-upgrade ever
> > is just a mistake.
>
> No, it is not. Using 'upgrade' (or 'safe-upgrade' when using aptitude)
> is the safe way to update your system without changing the set of
> installed packages.
>
> In the past, this list received many mails from people asking for help
> after apt(itude) removed some important package from their system. If
> all these people had made a habit of using dist-upgrade only when they
> know they really need it, they would have saved themselves a lot
> trouble.
>
> Of course, if you always check apt(itude)'s output before confirming its
> actions, you don't "break" your system either. But it is never a mistake
> to try the safe alternative first.
>
> J.
I think my original question was wrong told: It is not a matter of the
difference between upgrade and dist-upgrade (this difference i well known by
me), my question aimed more to like "Hey, if there are higher versions in
experimental, are they automatically installed, when doing apt-get
dist-upgrade (like it behave, if I am running testing and add the repository
of sid in sources.list) ? Or are all versions in experimental ignored, as
experimental is handled in a special way ?"
...similar to that, you know what I mean.
And yes, Jochen, I know the matter of dist-upgrade, and I always say:
upgrade is normal, but dist-upgrade is the "intelligent" upgrade (as you heve
to think, before confirming)!
Best regards
Hans
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