I'm running ubuntu on a raspberry pi 4 (8GB) and I cannot for the life of me get it to update because I think it can't find 91.189.91.38 80 for some reason even though I can go there through my browser just fine. I've been trying to fix this for ages. But 90% of the posts are super old and don't work and some people mention some things with a router but don't say what needs to be done and it's driving me nuts.
ubuntu@ubuntu:~$ sudo apt-get update && sudo apt-get upgrade
Ign:1 http://ports.ubuntu.com/ubuntu-ports trusty InRelease
Hit:2 https://download.mono-project.com/repo/ubuntu stable-focal InRelease
Get:3 http://ports.ubuntu.com/ubuntu-ports trusty-updates InRelease [65.9 kB]
Get:4 http://ports.ubuntu.com/ubuntu-ports trusty-security InRelease [65.9 kB]
Get:5 http://ports.ubuntu.com/ubuntu-ports focal InRelease [265 kB]
Get:6 http://ports.ubuntu.com/ubuntu-ports trusty Release [58.5 kB]
Get:7 http://ports.ubuntu.com/ubuntu-ports trusty-updates/main Sources [431 kB]
Get:8 http://ports.ubuntu.com/ubuntu-ports trusty-updates/main i386 Packages [1089 kB]
Ign:8 http://ports.ubuntu.com/ubuntu-ports trusty-updates/main i386 Packages
Get:10 http://ports.ubuntu.com/ubuntu-ports trusty Release.gpg [933 B]
Get:8 http://ports.ubuntu.com/ubuntu-ports trusty-updates/main i386 Packages [1355 kB]
Get:8 http://ports.ubuntu.com/ubuntu-ports trusty-updates/main i386 Packages [1355 kB]
Ign:8 http://ports.ubuntu.com/ubuntu-ports trusty-updates/main i386 Packages
Ign:13 http://ports.ubuntu.com/ubuntu-ports trusty-security/main i386 Packages
Err:8 http://ports.ubuntu.com/ubuntu-ports trusty-updates/main i386 Packages
404 Not Found [IP: 91.189.91.38 80]
Ign:13 http://ports.ubuntu.com/ubuntu-ports trusty-security/main i386 Packages
Err:13 http://ports.ubuntu.com/ubuntu-ports trusty-security/main i386 Packages
404 Not Found [IP: 91.189.91.38 80]
Get:14 http://ports.ubuntu.com/ubuntu-ports focal/universe arm64 Packages [8458 kB]
Get:15 http://ports.ubuntu.com/ubuntu-ports focal/universe i386 Packages [4642 kB]
Get:15 http://ports.ubuntu.com/ubuntu-ports focal/universe i386 Packages [4642 kB]
Get:15 http://ports.ubuntu.com/ubuntu-ports focal/universe i386 Packages [4642 kB]
Ign:15 http://ports.ubuntu.com/ubuntu-ports focal/universe i386 Packages
Ign:19 http://ports.ubuntu.com/ubuntu-ports trusty/main i386 Packages
Ign:15 http://ports.ubuntu.com/ubuntu-ports focal/universe i386 Packages
Ign:19 http://ports.ubuntu.com/ubuntu-ports trusty/main i386 Packages
Ign:15 http://ports.ubuntu.com/ubuntu-ports focal/universe i386 Packages
Err:19 http://ports.ubuntu.com/ubuntu-ports trusty/main i386 Packages
404 Not Found [IP: 91.189.91.38 80]
Ign:15 http://ports.ubuntu.com/ubuntu-ports focal/universe i386 Packages
Ign:15 http://ports.ubuntu.com/ubuntu-ports focal/universe i386 Packages
Err:15 http://ports.ubuntu.com/ubuntu-ports focal/universe i386 Packages
404 Not Found [IP: 91.189.91.38 80]
Fetched 456 kB in 7s (63.4 kB/s)
Reading package lists... Done
N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'https://download.mono-project.com/repo/ubuntu stable-focal InRelease' doesn't support architecture 'i386'
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/trusty-updates/main/binary-i386/Packages 404 Not Found [IP: 91.189.91.38 80]
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/trusty-security/main/binary-i386/Packages 404 Not Found [IP: 91.189.91.38 80]
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/focal/universe/binary-i386/Packages 404 Not Found [IP: 91.189.91.38 80]
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/trusty/main/binary-i386/Packages 404 Not Found [IP: 91.189.91.38 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
VERSION="20.04.2 LTS (Focal Fossa)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 20.04.2 LTS" VERSION_ID="20.04" HOME_URL="https://www.ubuntu.com/" SUPPORT_URL="https://help.ubuntu.com/" BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy" VERSION_CODENAME=focal UBUNTU_CODENAME=focal
– Hitch S May 18 '21 at 22:05i386
with http://ports.ubuntu.com? Ports is/was for the non-i386/amd64 architectures, like armhf and the like. – muru May 27 '21 at 15:23