aptitude and package removal

[Muzer]

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Willy K. Hamra wrote:
> so today, i ran aptitude full-upgrade, i saw on top that it was going to
> remove grub-doc.
> i wanted to see why the package is going to be removed, so i typed
> beside the (y/n/?) question "i grub-doc", and the answer was:
> 
> Do you want to continue? [Y/n/?] i grub-doc
> 
> Package: grub-doc
> 
> New: yes
> 
> State: installed; will be removed because nothing depends on it
> 
> Automatically installed: no
> 
> Version: 0.97-29ubuntu58
> 
> Priority: optional
> 
> Section: doc
> 
> as you can see, it was manually installed, i like to have the doc
> packages for quick references since internet is not always available or
> too slow to look up for help. it's going to be removed because nothing
> depends on it. but... there are tons of other packages that nothing
> depends on them :S
> according to my understanding, a package is usually removed when nothing
> depends on it, and was automatically installed as a dependency of
> another package. if the other package is removed, it gets removed as well.
> but this... it was *manually* installed. why is it flagged for removal?
> 
> 
Maybe an updated package depends on a package that conflicts with and
replaces it?

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