Can one "rollback" package updates?

[Christoph Bier]

Matt England schrieb am 11.05.2006 17:03:

> I should probably clarify:
> 
> Removing 1 package may not be difficult.   It's the broad set of packages 
> that one can install (eg, via the "Software Updates" gui tool) that's more 
> difficult.  It's hard, if not impossible, to know which packages

It's not impossible, at least if you use aptitude (I'm not familiar
with synaptic). Then you get a log file in /var/log/aptitude

> I don't want to have to do a system snapshot/backup at a low level (eg, dd 
> or file-system snapshot); I'm hoping to track this at an OS/application level.
> 
> Also:  what happens after new package upgrades an old one, and the new 
> package is removed?  Is the old package "put back" to its original state?

I'm not sure whether I understand you right. But upgrading a package
means removing the old one by a new one. So if you remove the new
package the old one was already removed before. Maybe you can still
find the old version in /var/cache/apt/archives.

[...]

Best,
  Christoph
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