If all are in use, consider removing some ppa(s) along with the corresponding keyfiles in /etc/apt/ 41 keys and you will get the GPG error "no public key found" even if you go through all the steps to add the missing key(s).Ĭheck to see if there are any unused keys in this file from ppa(s) you no longer use. However, I will leave this answer but apt-key is now deprecated so it is recommended we follow different methods for now.Īpt can only handle 40 keys in /etc/apt/.
Note: As of recent versions, it is no longer considered good practice to add PPA keys to the keyring.
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