Answered
I think I'm missing the obvious.
I expect the following to work:
wget -q -O - http://www.geogebra.net/lin... | sudo apt-key add -
sudo sh -c 'echo "deb http://www.geogebra.net/linux/ stable main" > /etc/apt/sources.list.d/geogebra.list'
sudo apt update
sudo apt install geogebra-classic
The result is that the packet geogebra-classic can not be found.
I try to install Geogebra 6 on all our students Ubuntu 18.04 laptops by distributing a script. It words like this using geogebra5.
Does anyone see what I'm missing?
Kind regards
Koen
The same question 
I noticed in the mean time that http://www.geogebra.net/lin... doesn't contain the package, but that it exists in http://www.geogebra.net/lin...
I found an unanswered question, also mentioning a problem installing with apt on a debian based system (xubuntu): https://help.geogebra.org/t...
To me it seems like a bug in the publishing of the debian package: it is not included in the packages file, so therefore apt can't find it . Can someone add this please? It would make the roll out of Geogebra so much easier for schools running Linux.
I'm having the same issue installing the geogebra-classic package on a number of machines too. Appears as Koen has said; the Packages.gz file does not contain reference to the .deb package for geogebra-classic.
Thank you for reporting this problem. We found the issue and we will fix it soon. Until then please use the direct link to the .deb file.
The problem has been fixed, thank you for your patience.
Yes. It works. Thanks a lot!
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