When I ran:
sudo apt-get update
I got these errors:
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://cli.github.com/packages stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23F3D4EA75716059
W: Failed to fetch https://cli.github.com/packages/dists/stable/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 23F3D4EA75716059
W: Some index files failed to download. They have been ignored, or old ones used instead.
So following other answers here, I tried to update the key using this:
sudo apt-key adv --recv-key --keyserver keyserver.ubuntu.com 23F3D4EA75716059
Which returned this:
Executing: /tmp/apt-key-gpghome.UZIznQa775/gpg.1.sh --recv-key --keyserver keyserver.ubuntu.com 23F3D4EA75716059
gpg: key 23F3D4EA75716059: public key "GitHub CLI <opensource+cli@github.com>" imported
gpg: Total number processed: 1
gpg: imported: 1
But when I run "sudo apt-get update" again, I get the same errors (see above) again.
I'm pretty much a Linux newbie. Can anyone see what I'm doing wrong? Thanks.
Here's the output of cat /etc/apt/sources.list:
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ca.archive.ubuntu.com/ubuntu/ focal main restricted
Major bug fix updates produced after the final release of the
distribution.
deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates main restricted
N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
team, and may not be under a free licence. Please satisfy yourself as to
your rights to use the software. Also, please note that software in
universe WILL NOT receive any review or updates from the Ubuntu security
team.
deb http://ca.archive.ubuntu.com/ubuntu/ focal universe
deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates universe
N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
team, and may not be under a free licence. Please satisfy yourself as to
your rights to use the software. Also, please note that software in
multiverse WILL NOT receive any review or updates from the Ubuntu
security team.
deb http://ca.archive.ubuntu.com/ubuntu/ focal multiverse
deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates multiverse
N.B. software from this repository may not have been tested as
extensively as that contained in the main release, although it includes
newer versions of some applications which may provide useful features.
Also, please note that software in backports WILL NOT receive any review
or updates from the Ubuntu security team.
deb http://ca.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
Uncomment the following two lines to add software from Canonical's
'partner' repository.
This software is not part of Ubuntu, but is offered by Canonical and the
respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu focal partner
deb-src http://archive.canonical.com/ubuntu bionic partner
deb http://security.ubuntu.com/ubuntu focal-security main restricted
deb http://security.ubuntu.com/ubuntu focal-security universe
deb http://security.ubuntu.com/ubuntu focal-security multiverse
deb http://archive.canonical.com/ubuntu lsb_release -cs partner
deb-src http://archive.canonical.com/ubuntu lsb_release -cs partner
