Anno domini 2020 Wed, 5 Aug 19:29:49 +0200
Slávek Banko scripsit:
> Dne st 5. srpna 2020 Dr. Nikolaus Klepp napsal(a):
> > > root@local [~]# apt-mark manual tde-trinity tdeutils-trinity
> > > tde-trinity was already set to manually installed.
> > > tdeutils-trinity set to manually installed.
> > >
> > > root@local [~]# apt-get purge klaptopdaemon-trinity
> > > {snip}
> > > The following packages were automatically installed and are no longer
> > > required:
> > > amor-trinity arts-trinity {snip} twin4-trinity xcalib
> > > Use 'apt autoremove' to remove them.
> > > The following packages will be REMOVED:
> > > klaptopdaemon-trinity* tde-trinity* tdeutils-trinity*
> > > 0 upgraded, 0 newly installed, 3 to remove and 3 not upgraded.
> > > After this operation, 840 kB disk space will be freed.
> > > Do you want to continue? [Y/n] n
> > > Abort.
> >
> > The metapackgs can be removed without any problem.
>
> Metapackages are good at installation, but poor servant during the removal
> of individual packages.
>
> For metapackages to work well for installation, there is a need for a hard
> dependency - Depends. If a looser dependency - Recomends - were used, the
> result could be that virtually nothing would be installed when the default
> apt setting is "without recommends". And here is the beginning of the
> problem. If a user wants to remove a package that is referenced by a
> metapackage, this will cause the metapackage to break => leads to its
> uninstallation and thus to the uninstallation of all other packages
> referenced by the metapackage.
>
> Therefore, before removing a metapackage, all referenced packages need to
> be switched to "manual" so that they are retained even if the metapackage
> is removed. This is more difficult to do manually with commands - it's
> much easier to use aptitude.
How do you do that with aptitude?
nik
>
> And that's exactly why we like aptitude. Aptitude is much more powerful and
> skillful than Synaptic. And just as useful as apt-get / apt-cache /
> apt-<something> or apt.
>
> Cheers
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