August 19, 2022 | Leave a comment Add this repo to /etc/apt/sources.list nano /etc/apt/sources.list deb http://deb.openswitch.net/stretch 3.2.1 opx opx-non-free Now run: sudo apt update You will receive an error like this: “The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 5EF20F34AD2074F “ Copy the characters after NO_PUBKEY from the last command and use it below YOUR PUBKEY WILL BE DIFFERENT apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 5EF20F34AD2074F1 Now that you have the correct signautures your command should be successful sudo apt update sudo apt install opx-dell-vm or depending on what you are doing…. sudo apt install opx-core Share this:FacebookTwitterPrintLinkedInMoreXLike this:Like Loading... Related