Ubuntu 20.04 LTS (Focal Fossa) -- Full sources.list

sources.list

deb http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

deb http://archive.canonical.com/ubuntu focal partner
deb-src http://archive.canonical.com/ubuntu focal partner

Thanks, it helps!

thaks bro,ily

http://archive.ubuntu.com/ubuntu focal-backports/universe arm64 Packages Fetched 38.0 MB in 6s (6,441 kB/s) Reading package lists... Done E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.39 80] E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-updates/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.39 80] E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-security/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.39 80] E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-backports/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.39 80] E: Some index files failed to download. They have been ignored, or old ones used instead.

Does anyone have the same issue? Thanks.

This source list [archive] is for x86, if you are using arm should change to [ports] source

Thanks :)

Thank you so much <3

Thanks bro

谢谢！傻逼清华园

Thank You

Thank you!

thanks bro