I'm still illiterate when it comes to coding and updating Ubuntu every two years seems to create more problems than it solves for me. At 66 years of age, I really would prefer NOT to have to go back to college just to use my PC without installing Windows.
When I tried to copy a DVD of home videos, I couldn't even find a Disc burner and the software list didn't show any software available whatsoever. When I tried to fix the problem by >>> sudo apt update at first I got the following:
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
Get:7 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Err:5 http://us.archive.ubuntu.com/ubuntu bionic InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
Err:7 http://security.ubuntu.com/ubuntu bionic-security InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
Fetched 672 kB in 2s (424 kB/s)
Reading package lists... Done
Building dependency tree... Done
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://us.archive.ubuntu.com/ubuntu bionic-updates InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://us.archive.ubuntu.com/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://security.ubuntu.com/ubuntu bionic-security InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/bionic/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/bionic-security/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3B4FE6ACC0B21F32
W: Some index files failed to download. They have been ignored, or old ones used instead.
I tried looking through the answers on Ask but the closest thing I could find was the impish thing. So I looked at that as well. That's where I got this result:
grep: /etc/apt/trusted.gpg.d/steam.gpg: binary file matches
grep: /etc/apt/trusted.gpg.d/ubuntu-keyring-2018-archive.gpg: binary file matches
grep: /etc/apt/trusted.gpg.d/ubuntu-keyring-2012-cdimage.gpg: binary file matches
Am I mistaken or is it possible that since I've had Steam on Ubuntu since 2012 and it's been updated/upgraded every two years since I first started using Ubuntu that somehow it's causing a problem with the repositories downloading properly for me?
