因为有些时候当我尝试更新我的 Ubuntu 系统时会出现非常奇怪的输出：
sudo apt update
Hit:1 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Hit:2 http://ppa.launchpad.net/jcfp/nobetas/ubuntu focal InRelease
Hit:3 https://deb.troglobit.com/debian stable InRelease
Hit:4 https://download.onlyoffice.com/repo/debian squeeze InRelease
Get:5 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease [114 kB]
Get:6 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease [108 kB]
Get:7 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease [114 kB]
Ign:8 http://ports.ubuntu.com/ubuntu-ports focal/main amd64 Packages
Ign:9 http://ports.ubuntu.com/ubuntu-ports focal/restricted amd64 Packages
Ign:10 http://ports.ubuntu.com/ubuntu-ports focal/universe amd64 Packages
Ign:11 http://ports.ubuntu.com/ubuntu-ports focal/multiverse amd64 Packages
Hit:12 https://repo.jellyfin.org/ubuntu focal InRelease
Ign:8 http://ports.ubuntu.com/ubuntu-ports focal/main amd64 Packages
Ign:9 http://ports.ubuntu.com/ubuntu-ports focal/restricted amd64 Packages
Ign:10 http://ports.ubuntu.com/ubuntu-ports focal/universe amd64 Packages
Ign:11 http://ports.ubuntu.com/ubuntu-ports focal/multiverse amd64 Packages
Ign:8 http://ports.ubuntu.com/ubuntu-ports focal/main amd64 Packages
Ign:9 http://ports.ubuntu.com/ubuntu-ports focal/restricted amd64 Packages
Ign:10 http://ports.ubuntu.com/ubuntu-ports focal/universe amd64 Packages
Ign:11 http://ports.ubuntu.com/ubuntu-ports focal/multiverse amd64 Packages
Ign:8 http://ports.ubuntu.com/ubuntu-ports focal/main amd64 Packages
Ign:9 http://ports.ubuntu.com/ubuntu-ports focal/restricted amd64 Packages
Ign:10 http://ports.ubuntu.com/ubuntu-ports focal/universe amd64 Packages
Ign:11 http://ports.ubuntu.com/ubuntu-ports focal/multiverse amd64 Packages
Ign:8 http://ports.ubuntu.com/ubuntu-ports focal/main amd64 Packages
Ign:9 http://ports.ubuntu.com/ubuntu-ports focal/restricted amd64 Packages
Ign:10 http://ports.ubuntu.com/ubuntu-ports focal/universe amd64 Packages
Ign:11 http://ports.ubuntu.com/ubuntu-ports focal/multiverse amd64 Packages
Err:8 http://ports.ubuntu.com/ubuntu-ports focal/main amd64 Packages
404 Not Found [IP: 185.125.190.36 80]
Ign:9 http://ports.ubuntu.com/ubuntu-ports focal/restricted amd64 Packages
Ign:10 http://ports.ubuntu.com/ubuntu-ports focal/universe amd64 Packages
Ign:11 http://ports.ubuntu.com/ubuntu-ports focal/multiverse amd64 Packages
Ign:13 http://ports.ubuntu.com/ubuntu-ports focal-updates/main amd64 Packages
Get:14 http://ports.ubuntu.com/ubuntu-ports focal-updates/main arm64 Packages [1396 kB]
Get:15 http://ports.ubuntu.com/ubuntu-ports focal-updates/main Translation-en [358 kB]
Get:16 http://ports.ubuntu.com/ubuntu-ports focal-updates/restricted amd64 Packages [1178 kB]
Get:16 http://ports.ubuntu.com/ubuntu-ports focal-updates/restricted amd64 Packages [1178 kB]
Get:16 http://ports.ubuntu.com/ubuntu-ports focal-updates/restricted amd64 Packages [1178 kB]
Ign:16 http://ports.ubuntu.com/ubuntu-ports focal-updates/restricted amd64 Packages
Ign:20 http://ports.ubuntu.com/ubuntu-ports focal-updates/universe amd64 Packages
Ign:21 http://ports.ubuntu.com/ubuntu-ports focal-updates/multiverse amd64 Packages
Ign:13 http://ports.ubuntu.com/ubuntu-ports focal-updates/main amd64 Packages
Ign:16 http://ports.ubuntu.com/ubuntu-ports focal-updates/restricted amd64 Packages
Ign:20 http://ports.ubuntu.com/ubuntu-ports focal-updates/universe amd64 Packages
Ign:21 http://ports.ubuntu.com/ubuntu-ports focal-updates/multiverse amd64 Packages
Ign:13 http://ports.ubuntu.com/ubuntu-ports focal-updates/main amd64 Packages
Ign:16 http://ports.ubuntu.com/ubuntu-ports focal-updates/restricted amd64 Packages
Ign:20 http://ports.ubuntu.com/ubuntu-ports focal-updates/universe amd64 Packages
Ign:21 http://ports.ubuntu.com/ubuntu-ports focal-updates/multiverse amd64 Packages
Ign:13 http://ports.ubuntu.com/ubuntu-ports focal-updates/main amd64 Packages
Ign:16 http://ports.ubuntu.com/ubuntu-ports focal-updates/restricted amd64 Packages
Ign:20 http://ports.ubuntu.com/ubuntu-ports focal-updates/universe amd64 Packages
Ign:21 http://ports.ubuntu.com/ubuntu-ports focal-updates/multiverse amd64 Packages
Ign:13 http://ports.ubuntu.com/ubuntu-ports focal-updates/main amd64 Packages
Ign:16 http://ports.ubuntu.com/ubuntu-ports focal-updates/restricted amd64 Packages
Ign:22 http://ports.ubuntu.com/ubuntu-ports focal-backports/main amd64 Packages
Ign:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages
Ign:20 http://ports.ubuntu.com/ubuntu-ports focal-updates/universe amd64 Packages
Ign:21 http://ports.ubuntu.com/ubuntu-ports focal-updates/multiverse amd64 Packages
Err:13 http://ports.ubuntu.com/ubuntu-ports focal-updates/main amd64 Packages
404 Not Found [IP: 185.125.190.36 80]
Ign:16 http://ports.ubuntu.com/ubuntu-ports focal-updates/restricted amd64 Packages
Ign:22 http://ports.ubuntu.com/ubuntu-ports focal-backports/main amd64 Packages
Ign:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages
Ign:20 http://ports.ubuntu.com/ubuntu-ports focal-updates/universe amd64 Packages
Ign:21 http://ports.ubuntu.com/ubuntu-ports focal-updates/multiverse amd64 Packages
Ign:22 http://ports.ubuntu.com/ubuntu-ports focal-backports/main amd64 Packages
Ign:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages
Ign:22 http://ports.ubuntu.com/ubuntu-ports focal-backports/main amd64 Packages
Ign:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages
Ign:22 http://ports.ubuntu.com/ubuntu-ports focal-backports/main amd64 Packages
Ign:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages
Err:22 http://ports.ubuntu.com/ubuntu-ports focal-backports/main amd64 Packages
404 Not Found [IP: 185.125.190.36 80]
Get:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages [104 kB]
Get:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages [104 kB]
Get:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages [104 kB]
Get:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages [104 kB]
Get:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages [104 kB]
Get:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages [104 kB]
Ign:23 http://ports.ubuntu.com/ubuntu-ports focal-backports/universe amd64 Packages
Ign:30 http://ports.ubuntu.com/ubuntu-ports focal-security/main amd64 Packages
Ign:31 http://ports.ubuntu.com/ubuntu-ports focal-security/restricted amd64 Packages
Ign:32 http://ports.ubuntu.com/ubuntu-ports focal-security/universe amd64 Packages
Ign:33 http://ports.ubuntu.com/ubuntu-ports focal-security/multiverse amd64 Packages
Ign:30 http://ports.ubuntu.com/ubuntu-ports focal-security/main amd64 Packages
Ign:31 http://ports.ubuntu.com/ubuntu-ports focal-security/restricted amd64 Packages
Ign:32 http://ports.ubuntu.com/ubuntu-ports focal-security/universe amd64 Packages
Ign:33 http://ports.ubuntu.com/ubuntu-ports focal-security/multiverse amd64 Packages
Ign:30 http://ports.ubuntu.com/ubuntu-ports focal-security/main amd64 Packages
Ign:31 http://ports.ubuntu.com/ubuntu-ports focal-security/restricted amd64 Packages
Ign:32 http://ports.ubuntu.com/ubuntu-ports focal-security/universe amd64 Packages
Ign:33 http://ports.ubuntu.com/ubuntu-ports focal-security/multiverse amd64 Packages
Ign:30 http://ports.ubuntu.com/ubuntu-ports focal-security/main amd64 Packages
Ign:31 http://ports.ubuntu.com/ubuntu-ports focal-security/restricted amd64 Packages
Ign:32 http://ports.ubuntu.com/ubuntu-ports focal-security/universe amd64 Packages
Ign:33 http://ports.ubuntu.com/ubuntu-ports focal-security/multiverse amd64 Packages
Ign:30 http://ports.ubuntu.com/ubuntu-ports focal-security/main amd64 Packages
Ign:31 http://ports.ubuntu.com/ubuntu-ports focal-security/restricted amd64 Packages
Ign:32 http://ports.ubuntu.com/ubuntu-ports focal-security/universe amd64 Packages
Ign:33 http://ports.ubuntu.com/ubuntu-ports focal-security/multiverse amd64 Packages
Err:30 http://ports.ubuntu.com/ubuntu-ports focal-security/main amd64 Packages
404 Not Found [IP: 185.125.190.36 80]
Ign:31 http://ports.ubuntu.com/ubuntu-ports focal-security/restricted amd64 Packages
Ign:32 http://ports.ubuntu.com/ubuntu-ports focal-security/universe amd64 Packages
Ign:33 http://ports.ubuntu.com/ubuntu-ports focal-security/multiverse amd64 Packages
Fetched 336 kB in 3s (122 kB/s)
Reading package lists... Done
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/focal/main/binary-amd64/Packages 404 Not Found [IP: 185.125.190.36 80]
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/focal-updates/main/binary-amd64/Packages 404 Not Found [IP: 185.125.190.36 80]
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/focal-backports/main/binary-amd64/Packages 404 Not Found [IP: 185.125.190.36 80]
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/focal-security/main/binary-amd64/Packages 404 Not Found [IP: 185.125.190.36 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
我该怎么办？几天前，我从未收到过这么多“点击”、“获取”、“忽略”等消息。
这是我的架构：
wolf@frida:/etc/apt$ lscpu
Architecture: aarch64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
这是我的来源列表：
wolf@frida:/etc/apt$ cat sources.list
## Note, this file is written by cloud-init on first boot of an instance
## modifications made here will not survive a re-bundle.
## if you wish to make changes you can:
## a.) add 'apt_preserve_sources_list: true' to /etc/cloud/cloud.cfg
## or do the same in user-data
## b.) add sources in /etc/apt/sources.list.d
## c.) make changes to template file /etc/cloud/templates/sources.list.tmpl
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ports.ubuntu.com/ubuntu-ports focal main restricted
# deb-src http://ports.ubuntu.com/ubuntu-ports focal main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://ports.ubuntu.com/ubuntu-ports focal-updates main restricted
# deb-src http://ports.ubuntu.com/ubuntu-ports focal-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://ports.ubuntu.com/ubuntu-ports focal universe
# deb-src http://ports.ubuntu.com/ubuntu-ports focal universe
deb http://ports.ubuntu.com/ubuntu-ports focal-updates universe
# deb-src http://ports.ubuntu.com/ubuntu-ports 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://ports.ubuntu.com/ubuntu-ports focal multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports focal multiverse
deb http://ports.ubuntu.com/ubuntu-ports focal-updates multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports 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://ports.ubuntu.com/ubuntu-ports focal-backports main restricted universe multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports 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 focal partner
deb http://ports.ubuntu.com/ubuntu-ports focal-security main restricted
# deb-src http://ports.ubuntu.com/ubuntu-ports focal-security main restricted
deb http://ports.ubuntu.com/ubuntu-ports focal-security universe
# deb-src http://ports.ubuntu.com/ubuntu-ports focal-security universe
deb http://ports.ubuntu.com/ubuntu-ports focal-security multiverse
# deb-src http://ports.ubuntu.com/ubuntu-ports focal-security multiverse
谢谢！
答案1
ports.ubuntu.com 存储库用于非amd64 架构：arm64、armhf、ppc64el、riscv64 和 s390x。
他们那里没有 amd64 包。
您选择了地球上唯一一个不适用于您的 amd64 系统的存储库，因此只需选择任何其他存储库即可。