On 01/28/2017 02:16 PM, Joachim Fahrner wrote:
> Hello Florian,
>
>
> Am 28.01.2017 um 12:33 schrieb Florian Zieboll:
>> to avoid accidents like this, I have the following lines in my apt
>> preferences:
>>

>>    Package: *
>>    Pin: release a=jessie-backports
>>    Pin-Priority: 150

>
> I know that, but I was used this is a default in Debian. In Devuan this
> is not a default, so I accidently upgraded ALL packages :-(

That happened to me recently and necessitated doing a fresh
installation, since the new packages took out the networking and
bluetooth. I fortunately have the data and system partitions separated
so that was easy ... and I still had the installation CD's ISO-9660
image still cached locally.

So the situation is not necessarily as rare as one might hope.

Regards,
Lars