When I install a new Ubuntu on a device and want to install graph-tool,
following the instructions:
https://git.skewed.de/count0/graph-tool/wikis/installation-instructions#debian-ubuntu
at the moment with bionic version of Ubuntu (18.04), but I always get the
error message:
W: GPG error: http://downloads.skewed.de/apt/bionic bionic Release: The
following signatures couldn't be verified because the public key is not
available: NO_PUBKEY 7A80C8ED4FCCBE09
If I run the:
If you want to verify the packages, you should use the public key
612DEFB798507F25, which can be done with the command:
apt-key adv --keyserver pgp.skewed.de --recv-key 612DEFB798507F25
command, I still get the same error.
If I change the key to the one it is complaining about,
7A80C8ED4FCCBE09
still complaining.
What do I have to do?
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