dexrock

I had the same problem with NO_PUBKEY 93D6889F9F0E78D5 from APT UPDATE when I reinstalled Armbian 22.05.3 on my Banana Pi. Use this command to get the PUBKEY from the Ubuntu Keyserver and write it correctly to /etc/apt/trusted.gpg.d: wget http://keyserver.ubuntu.com/pks/lookup\?op\=get\&search\=0xdf00faf1c577104b50bf1d0093d6889f9f0e78d5 | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/armbian.gpg