Gpg
Setup
Generate a key
gpg2 --full-gen-key
Yubikey setup
Following https://blog.programster.org/yubikey-link-with-gpg
sudo apt install pcscd scdaemon gnupg2 pcsc-tools
After that, plug in the yubikey and do
gpg2 --card-edit gpg/card> admin # enables admin commands gpg/card> passwd # then set Admin PIN
I seem to have broken something :-/. gpg/card> reset seems to fix it.
Trying yubico-piv-tool
sudo apt install check libpcsclite-dev ./configure make sudo make install
but then I have to go into yubico-piv-tool-1.6.2/lib/.libs to run since it didn't copy the .so files.