How do I fix this error?
st@ThinkPad-T450s:~/Downloads$ sudo do-release-upgrade -d Checking for a new Ubuntu release Get:1 Upgrade tool signature [836 B] Get:2 Upgrade tool [1.264 kB] Fetched 1.264 kB in 0s (0 B/s) authenticate 'zesty.tar.gz' against 'zesty.tar.gz.gpg' Authentication failed Authenticating the upgrade failed. There may be a problem with the network or with the server.
I get the same error with
I know I can turn off gpg authentication in apt-get but not in do-release-upgrade or update-manager