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Die folgenden Pakete haben unerfüllte Abhängigkeiten:
libssl-dev : Hängt ab von: libssl1.0.0 (= 1.0.1t-1+deb8u6) aber 1.0.2k-1~bpo8+1 soll installiert werden
E: Probleme können nicht korrigiert werden, Sie haben zurückgehaltene defekte Pakete.
the second part say there is a broken paket, how to resolve this Problem
apt-get install -f
apt-get autoremove
apt-get autoclean
hello @debiman
i never saw this (LC_ALL=C apt ) before
LC_ALL=C apt install libssl-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
libssl-dev : Depends: libssl1.0.0 (= 1.0.1t-1+deb8u6) but 1.0.2l-1~bpo8+1 is to be installed
Recommends: libssl-doc but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
Are you using Stretch? Then there is no libssl1.0.0 , that's the old version that's not supposed to be used anymore. Of course, some external debian packages still depend on it. You can manually install libssl1.0.0 from Jessie -- this works for now, but I wouldn't recommend that, since you might end up with a Frankendebian in the future (it works for now, but it's not the way it's supposed to be). The best approach would be to tell the maintainer of the software you want to install to bump the dependency to 1.0.2 or better yet 1.1.