I have Webmin installed on my VPS as the web panel. Recently, I saw the update error in the Terminal window.
Err:8 https://download.webmin.com/download/newkey/repository stable Release.gpg The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2D223B918916F2A2 Fetched 16.8 kB in 1s (12.9 kB/s) Reading package lists... Done Building dependency tree... Done Reading state information... Done All packages are up to date. W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://download.webmin.com/download/newkey/repository stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2D223B918916F2A2 W: Failed to fetch https://download.webmin.com/download/ne ... elease.gpg The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2D223B918916F2A2 W: Some index files failed to download. They have been ignored, or old ones used instead.
I did the search. Run the following commands in the command.
wget https://raw.githubusercontent.com/webmin/webmin/master/setup-repos.sh sh setup-repos.sh
~$ sudo sh setup-repos.sh Setup Webmin official repository? (y/N) y Downloading Webmin key .. .. done Installing Webmin key .. .. done Setting up Webmin repository .. .. done Cleaning repository metadata .. .. done Downloading repository metadata .. .. done
Then, there is no error when I run the command
sudo apt update.