richard@richard-iMac:~/Coding/wrap$ sudo apt update
[sudo] password for richard:
Hit:1 http://a...content-available-to-author-only...l.com/ubuntu xenial InRelease
Hit:2 http://g...content-available-to-author-only...u.com/ubuntu xenial InRelease
Hit:3 http://r...content-available-to-author-only...d.com/steam precise InRelease
Get:4 http://g...content-available-to-author-only...u.com/ubuntu xenial-updates InRelease [102 kB]
Hit:5 http://p...content-available-to-author-only...d.net/sixxie/ppa/ubuntu trusty InRelease
Ign:6 http://l...content-available-to-author-only...x.com/ubuntu wily InRelease
Hit:7 http://p...content-available-to-author-only...d.net/c.falco/mame/ubuntu xenial InRelease
Get:8 http://l...content-available-to-author-only...x.com/ubuntu wily Release [6,596 B]
Hit:9 http://p...content-available-to-author-only...d.net/sixxie/ppa/ubuntu xenial InRelease
Get:10 http://g...content-available-to-author-only...u.com/ubuntu xenial-backports InRelease [102 kB]
Ign:11 http://dl.google.com/linux/chrome/deb stable InRelease
Get:12 http://s...content-available-to-author-only...u.com/ubuntu xenial-security InRelease [102 kB]
Get:13 http://dl.google.com/linux/chrome/deb stable Release [1,189 B]
Get:15 http://dl.google.com/linux/chrome/deb stable Release.gpg [819 B]
Err:15 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
Fetched 314 kB in 1s (267 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
1 package can be upgraded. Run 'apt list --upgradable' to see it.
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.
richard@richard-iMac:~/Coding/wrap$