While running update command after some time we were getting GPG error. It was showing an error message with public key => EAA903E3A2F4C039 not found.
Run following command to solve this problem:
sudo apt-key adv –recv-keys –keyserver keyserver.ubuntu.com EAA903E3A2F4C039
EAA903E3A2F4C039 is the key that I was getting in the error, it will be different for different systems.
apt-key Command Description:
apt-key is used to manage the list of keys used by apt to authenticate packages. Packages which have been authenticated using these keys will be considered trusted.
adv – Pass advanced options to gpg. With adv –recv-key you can download the public key.
By running above command we added missing public key to the system and it works.
Webner Solutions is a Software Development company focused on developing CRM apps (Salesforce, Zoho), LMS Apps (Moodle/Totara), Websites and Mobile apps. If you need any software development assistance please contact us at firstname.lastname@example.org