Create your Android Debug key and copy it into the system clipboard:

echo "android" | /usr/lib/jvm/java-10-openjdk/bin/keytool -list -v -alias androiddebugkey -keystore ~/.android/debug.keystore > pbcopy

Replace /usr/lib/jvm/java-10/openjdk with the path of your installation.

If you don’t have pbcopy, use xclip (see link below).