Question

Trying to upgrade ubuntu 20.04lts to 22.04lts using do-release-upgrade, but getting public key errors

Currently 2 droplets to upgrade. both are:

  • Distributor ID: Ubuntu
  • Description: Ubuntu 20.04.6 LTS
  • Release: 20.04\
  • Codename: focal

Following the turotial: https://www.digitalocean.com/community/tutorials/how-to-upgrade-to-ubuntu-22-04-jammy-jellyfish

however I get the following errors (which appear to be signing error on DO reporitory) after running sudo do-release-upgrade:

*Err https://repos.insights.digitalocean.com/apt/do-agent main InRelease                                                            
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 77B79B3FFAF7EF65                
Err https://repos-droplet.digitalocean.com/apt/droplet-agent main InRelease                                                        
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 35696F43FC7DB4C2                
Fetched 11.0 kB in 0s (0 B/s)

Error during update

A problem occurred during the update. This is usually some sort of network problem, please check your network connection and retry.

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://repos.insights.digitalocean.com/apt/do-agent main InRelease: 
The following signatures couldn't be verified because the public key 
is not available: NO_PUBKEY 77B79B3FFAF7EF65, E:The repository 
'https://repos.insights.digitalocean.com/apt/do-agent main InRelease' 
is not signed., 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://repos-droplet.digitalocean.com/apt/droplet-agent 
main InRelease: The following signatures couldn't be verified because 
the public key is not available: NO_PUBKEY 35696F43FC7DB4C2, E:The 
repository 'https://repos-droplet.digitalocean.com/apt/droplet-agent 
main InRelease' is not signed. *

Any suggestions would be appreciated.

Paul

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KFSys
Site Moderator
Site Moderator badge
• May 16, 2023

Hey @stonehousetraveller.

I’ve found a similar question in the community, here it is :

https://www.digitalocean.com/community/questions/how-to-fix-no_pubkey-77b79b3ffaf7ef65

Basically, what you need to do is add the missing keys:

  1. sudo apt-key adv --keyserver repos.insights.digitalocean.com/apt/do-agent --recv-keys 77B79B3FFAF7EF65

  2. sudo apt-key adv --keyserver repos-droplet.digitalocean.com/apt/droplet-agent --recv-keys 35696F43FC7DB4C2

If the above doesn’t work, try running:

  1. wget -qO - https://repos.insights.digitalocean.com/apt/do-agent | sudo apt-key add -

  2. 

  3. wget -qO - https://repos.insights.digitalocean.com/apt/droplet-agent | sudo apt-key add -

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