Untitled

volchok@lunchbox:~$ sudo apt update

[sudo] password for volchok:

Ign:1 http://dl.google.com/linux/chrome/deb stable InRelease                  

Hit:2 http://ppa.launchpad.net/overcoder/hexchat/ubuntu xenial InRelease      

Hit:3 http://repository.spotify.com stable InRelease                          

Get:4 http://dl.google.com/linux/chrome/deb stable Release [1,189 B]          

Hit:5 http://security.ubuntu.com/ubuntu xenial-security InRelease              

Get:6 http://dl.google.com/linux/chrome/deb stable Release.gpg [819 B]        

Hit:7 http://us.archive.ubuntu.com/ubuntu xenial InRelease                    

Hit:8 http://ppa.launchpad.net/videolan/stable-daily/ubuntu xenial InRelease

Err:6 http://dl.google.com/linux/chrome/deb stable Release.gpg

  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6494C6D6997C215E

Hit:9 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease

Hit:10 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease

Fetched 819 B in 2s (344 B/s)                      

Reading package lists... Done

Building dependency tree      

Reading state information... Done

All packages are up to date.

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://dl.google.com/linux/chrome/deb stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6494C6D6997C215E

W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release.gpg  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6494C6D6997C215E

W: Some index files failed to download. They have been ignored, or old ones used instead.

volchok@lunchbox:~$