linux – Cannot upgrade to Ubuntu 24.04 from 22.04.5?
I tried to upgrade to the newest Ubuntu (as the system suggested by pop up message).
But during the upgrade (close to the beginning) I got the following error:
W:Updating from such a repository can't be done securely, and is therefore disabled by default.,
W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:GPG error: https://download.virtualbox.org/virtualbox/debian jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A2F683C52980AECF,
E:The repository 'https://download.virtualbox.org/virtualbox/debian jammy InRelease' is not signed.
How can I solve this?
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