当我尝试通过软件更新程序进行更新时，显示此错误：
当然，人们通常会用以下方法解决这个问题（正如我之前问过的这里）：
sudo apt-get update && sudo apt-get upgrade
然而，这只会产生自己的错误：
E: Some index files failed to download. They have been ignored, or old
ones used instead.
我认为这可能与某种连接问题有关，但无论我的 VPN 是否正在运行，我都会收到相同的错误......更不用说其他一切都没有连接问题。
任何帮助，将不胜感激...
顺便说一下，这里是完整的终端说辞：
Hit http://repo.steampowered.com precise InRelease
Ign http://extras.ubuntu.com trusty InRelease
Ign http://download.opensuse.org InRelease
Ign http://old-releases.ubuntu.com raring InRelease
Ign http://dl.google.com stable InRelease
Get:1 http://repository.spotify.com stable InRelease [3,300 B]
Ign http://ppa.launchpad.net trusty InRelease
Ign http://repository.spotify.com stable InRelease
Ign http://security.ubuntu.com trusty-security InRelease
Hit http://repo.steampowered.com precise/steam Sources
Hit http://extras.ubuntu.com trusty Release.gpg
Ign http://download.opensuse.org InRelease
Hit http://old-releases.ubuntu.com raring Release.gpg
Ign http://repository.spotify.com stable/non-free amd64
Packages/DiffIndex Hit http://dl.google.com stable Release.gpg
Ign http://ppa.launchpad.net trusty InRelease
Hit http://security.ubuntu.com trusty-security Release.gpg
Hit http://extras.ubuntu.com trusty Release
Hit http://download.opensuse.org Release.gpg
Ign http://repository.spotify.com stable/non-free i386
Packages/DiffIndex Hit http://old-releases.ubuntu.com raring
Release Hit http://dl.google.com stable
Release Ign
http://ppa.launchpad.net trusty InRelease
Ign http://au.archive.ubuntu.com trusty InRelease
Hit http://security.ubuntu.com trusty-security Release
Hit http://repo.steampowered.com precise/steam amd64 Packages
Hit http://extras.ubuntu.com trusty/main Sources
Hit http://download.opensuse.org Release.gpg
Hit http://old-releases.ubuntu.com raring/main amd64 Packages
Ign http://ppa.launchpad.net trusty InRelease
Hit http://dl.google.com stable/main amd64 Packages
Hit http://security.ubuntu.com trusty-security/main Sources
Hit http://extras.ubuntu.com trusty/main amd64 Packages
Hit http://download.opensuse.org Release
Hit http://old-releases.ubuntu.com raring/restricted amd64 Packages
Ign http://ppa.launchpad.net trusty InRelease
Hit http://dl.google.com stable/main i386 Packages
Ign http://au.archive.ubuntu.com trusty-updates InRelease
Hit http://repo.steampowered.com precise/steam i386 Packages
Hit http://extras.ubuntu.com trusty/main i386 Packages
Hit http://download.opensuse.org Release
Hit http://old-releases.ubuntu.com raring/universe amd64 Packages
Hit http://security.ubuntu.com trusty-security/restricted Sources
Ign http://ppa.launchpad.net trusty InRelease
Hit http://download.opensuse.org Packages
Ign http://au.archive.ubuntu.com trusty-backports InRelease
Hit http://old-releases.ubuntu.com raring/multiverse amd64 Packages
Ign http://ppa.launchpad.net trusty InRelease
Hit http://security.ubuntu.com trusty-security/universe Sources
Hit http://old-releases.ubuntu.com raring/main i386 Packages
Ign http://ppa.launchpad.net trusty InRelease
Hit http://security.ubuntu.com trusty-security/multiverse Sources
Ign http://au.archive.ubuntu.com trusty Release.gpg
Hit http://old-releases.ubuntu.com raring/restricted i386 Packages
Ign http://ppa.launchpad.net trusty InRelease
Hit http://security.ubuntu.com trusty-security/main amd64 Packages
Hit http://old-releases.ubuntu.com raring/universe i386 Packages
Hit http://download.opensuse.org Packages
Ign http://ppa.launchpad.net trusty InRelease
Ign http://au.archive.ubuntu.com trusty-updates Release.gpg
Hit http://security.ubuntu.com trusty-security/restricted amd64
Packages Hit http://old-releases.ubuntu.com raring/multiverse
i386 Packages Ign http://ppa.launchpad.net trusty
InRelease Hit
http://security.ubuntu.com trusty-security/universe amd64 Packages
Hit http://old-releases.ubuntu.com raring/main Translation-en_AU
Hit http://ppa.launchpad.net trusty Release.gpg
Ign http://au.archive.ubuntu.com trusty-backports Release.gpg
Hit http://old-releases.ubuntu.com raring/main Translation-en
Hit http://security.ubuntu.com trusty-security/multiverse amd64
Packages Hit http://ppa.launchpad.net trusty Release.gpg
Ign http://au.archive.ubuntu.com trusty Release
Hit http://old-releases.ubuntu.com raring/multiverse Translation-en_AU
Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://security.ubuntu.com trusty-security/main i386 Packages
Ign http://dl.google.com stable/main Translation-en_AU
Ign http://extras.ubuntu.com trusty/main Translation-en_AU
Hit http://old-releases.ubuntu.com raring/multiverse Translation-en
Hit http://ppa.launchpad.net trusty Release.gpg
Ign http://dl.google.com stable/main Translation-en
Hit http://security.ubuntu.com trusty-security/restricted i386
Packages Ign http://au.archive.ubuntu.com trusty-updates
Release Ign http://extras.ubuntu.com
trusty/main Translation-en Hit
http://old-releases.ubuntu.com raring/restricted Translation-en_AU
Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://security.ubuntu.com trusty-security/universe i386 Packages
Hit http://old-releases.ubuntu.com raring/restricted Translation-en
Hit http://ppa.launchpad.net trusty Release.gpg
Ign http://au.archive.ubuntu.com trusty-backports Release
Hit http://repository.spotify.com stable/non-free amd64 Packages
Hit http://security.ubuntu.com trusty-security/multiverse i386
Packages Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://repository.spotify.com stable/non-free i386 Packages
Ign http://au.archive.ubuntu.com trusty/main Sources/DiffIndex
Hit http://security.ubuntu.com trusty-security/main Translation-en
Get:2 http://ppa.launchpad.net trusty Release.gpg [316 B]
Ign http://repository.spotify.com stable/non-free Translation-en_AU
Hit http://old-releases.ubuntu.com raring/universe Translation-en
Hit http://security.ubuntu.com trusty-security/multiverse
Translation-en Hit http://ppa.launchpad.net trusty Release.gpg
Ign http://repository.spotify.com stable/non-free Translation-en
Ign http://au.archive.ubuntu.com trusty/restricted Sources/DiffIndex
Hit http://security.ubuntu.com trusty-security/restricted
Translation-en Hit http://ppa.launchpad.net trusty Release.gpg
Ign http://au.archive.ubuntu.com trusty/universe Sources/DiffIndex
Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://security.ubuntu.com trusty-security/universe Translation-en
Ign http://old-releases.ubuntu.com raring/universe Translation-en_AU
Ign http://au.archive.ubuntu.com trusty/multiverse Sources/DiffIndex
Hit http://ppa.launchpad.net trusty Release
Ign http://repo.steampowered.com precise/steam Translation-en_AU
Hit http://ppa.launchpad.net trusty Release
Ign http://au.archive.ubuntu.com trusty/main amd64 Packages/DiffIndex
Ign http://repo.steampowered.com precise/steam Translation-en
Ign http://download.opensuse.org Translation-en_AU
Hit http://ppa.launchpad.net trusty Release
Ign http://download.opensuse.org Translation-en
Hit http://ppa.launchpad.net trusty Release
Ign http://au.archive.ubuntu.com trusty/restricted amd64
Packages/DiffIndex Ign http://download.opensuse.org
Translation-en_AU Hit
http://ppa.launchpad.net trusty Release
Ign http://au.archive.ubuntu.com trusty/universe amd64
Packages/DiffIndex Ign http://download.opensuse.org
Translation-en Hit
http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty Release
Ign http://au.archive.ubuntu.com trusty/multiverse amd64
Packages/DiffIndex Hit http://ppa.launchpad.net trusty Release
Ign http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty Release
Ign http://au.archive.ubuntu.com trusty/main i386 Packages/DiffIndex
Hit http://ppa.launchpad.net trusty Release
Ign http://au.archive.ubuntu.com trusty/restricted i386
Packages/DiffIndex Hit http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty/main amd64 Packages
Ign http://au.archive.ubuntu.com trusty/universe i386
Packages/DiffIndex Hit http://ppa.launchpad.net trusty/main
i386 Packages Hit http://ppa.launchpad.net
trusty/main Translation-en Ign
http://au.archive.ubuntu.com trusty/multiverse i386 Packages/DiffIndex
Hit http://ppa.launchpad.net trusty/main amd64 Packages
Hit http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Hit http://ppa.launchpad.net trusty/main amd64 Packages
Hit http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Hit http://ppa.launchpad.net trusty/main amd64 Packages
Hit http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Hit http://ppa.launchpad.net trusty/main amd64 Packages
Hit http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Hit http://ppa.launchpad.net trusty/main amd64 Packages
Hit http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Hit http://ppa.launchpad.net trusty/main amd64 Packages
Ign http://au.archive.ubuntu.com trusty-updates/main Sources/DiffIndex
Hit http://ppa.launchpad.net trusty/main i386 Packages
Ign http://au.archive.ubuntu.com trusty-updates/restricted
Sources/DiffIndex Hit http://ppa.launchpad.net trusty/main
Translation-en Ign http://ppa.launchpad.net
trusty/main amd64 Packages/DiffIndex Ign
http://au.archive.ubuntu.com trusty-updates/universe Sources/DiffIndex
Ign http://ppa.launchpad.net trusty/main i386 Packages/DiffIndex
Ign http://au.archive.ubuntu.com trusty-updates/multiverse
Sources/DiffIndex Ign http://au.archive.ubuntu.com
trusty-updates/main amd64 Packages/DiffIndex Hit
http://ppa.launchpad.net trusty/main amd64 Packages
Ign http://au.archive.ubuntu.com trusty-updates/restricted amd64
Packages/DiffIndex Hit http://ppa.launchpad.net trusty/main i386
Packages Hit http://ppa.launchpad.net
trusty/main Translation-en Ign
http://au.archive.ubuntu.com trusty-updates/universe amd64
Packages/DiffIndex Hit http://ppa.launchpad.net trusty/main amd64
Packages Ign http://au.archive.ubuntu.com
trusty-updates/multiverse amd64 Packages/DiffIndex Hit
http://ppa.launchpad.net trusty/main i386 Packages
Hit http://ppa.launchpad.net trusty/main Translation-en
Ign http://au.archive.ubuntu.com trusty-updates/main i386
Packages/DiffIndex Hit http://ppa.launchpad.net trusty/main amd64
Packages Hit http://ppa.launchpad.net
trusty/main i386 Packages Ign
http://au.archive.ubuntu.com trusty-updates/restricted i386
Packages/DiffIndex Hit http://ppa.launchpad.net trusty/main
Translation-en Hit http://ppa.launchpad.net
trusty/main amd64 Packages Ign
http://au.archive.ubuntu.com trusty-updates/universe i386
Packages/DiffIndex Hit http://ppa.launchpad.net trusty/main i386
Packages Ign http://au.archive.ubuntu.com
trusty-updates/multiverse i386 Packages/DiffIndex Ign
http://ppa.launchpad.net trusty/main Translation-en_AU
Ign http://ppa.launchpad.net trusty/main Translation-en
Ign http://au.archive.ubuntu.com trusty-backports/main
Sources/DiffIndex Ign http://au.archive.ubuntu.com
trusty-backports/restricted Sources/DiffIndex Ign
http://au.archive.ubuntu.com trusty-backports/universe
Sources/DiffIndex Ign http://au.archive.ubuntu.com
trusty-backports/multiverse Sources/DiffIndex Ign
http://au.archive.ubuntu.com trusty-backports/main amd64
Packages/DiffIndex Ign http://au.archive.ubuntu.com
trusty-backports/restricted amd64 Packages/DiffIndex Ign
http://au.archive.ubuntu.com trusty-backports/universe amd64
Packages/DiffIndex Ign http://au.archive.ubuntu.com
trusty-backports/multiverse amd64 Packages/DiffIndex Ign
http://au.archive.ubuntu.com trusty-backports/main i386
Packages/DiffIndex Ign http://au.archive.ubuntu.com
trusty-backports/restricted i386 Packages/DiffIndex Ign
http://au.archive.ubuntu.com trusty-backports/universe i386
Packages/DiffIndex Ign http://au.archive.ubuntu.com
trusty-backports/multiverse i386 Packages/DiffIndex Ign
http://au.archive.ubuntu.com trusty/main Translation-en_AU Ign
http://au.archive.ubuntu.com trusty/main Translation-en Ign
http://au.archive.ubuntu.com trusty/multiverse Translation-en_AU Ign
http://au.archive.ubuntu.com trusty/multiverse Translation-en Ign
http://au.archive.ubuntu.com trusty/restricted Translation-en_AU Ign
http://au.archive.ubuntu.com trusty/restricted Translation-en Ign
http://au.archive.ubuntu.com trusty/universe Translation-en_AU Ign
http://au.archive.ubuntu.com trusty/universe Translation-en Ign
http://au.archive.ubuntu.com trusty-updates/main Translation-en_AU Ign
http://au.archive.ubuntu.com trusty-updates/main Translation-en Ign
http://au.archive.ubuntu.com trusty-updates/multiverse
Translation-en_AU Ign http://au.archive.ubuntu.com
trusty-updates/multiverse Translation-en Ign
http://au.archive.ubuntu.com trusty-updates/restricted
Translation-en_AU Ign http://au.archive.ubuntu.com
trusty-updates/restricted Translation-en Ign
http://au.archive.ubuntu.com trusty-updates/universe Translation-en_AU
Ign http://au.archive.ubuntu.com trusty-updates/universe
Translation-en Ign http://au.archive.ubuntu.com trusty-backports/main
Translation-en_AU Ign http://au.archive.ubuntu.com
trusty-backports/main Translation-en Ign http://au.archive.ubuntu.com
trusty-backports/multiverse Translation-en_AU Ign
http://au.archive.ubuntu.com trusty-backports/multiverse
Translation-en Ign http://au.archive.ubuntu.com
trusty-backports/restricted Translation-en_AU Ign
http://au.archive.ubuntu.com trusty-backports/restricted
Translation-en Ign http://au.archive.ubuntu.com
trusty-backports/universe Translation-en_AU Ign
http://au.archive.ubuntu.com trusty-backports/universe Translation-en
Err http://au.archive.ubuntu.com trusty/main Sources 404 Not Found
[IP: 202.158.214.106 80] Err http://au.archive.ubuntu.com
trusty/restricted Sources 404 Not Found [IP: 202.158.214.106 80]
Err http://au.archive.ubuntu.com trusty/universe Sources 404 Not
Found [IP: 202.158.214.106 80] Err http://au.archive.ubuntu.com
trusty/multiverse Sources 404 Not Found [IP: 202.158.214.106 80]
Err http://au.archive.ubuntu.com trusty/main amd64 Packages 404 Not
Found [IP: 202.158.214.106 80] Err http://au.archive.ubuntu.com
trusty/restricted amd64 Packages 404 Not Found [IP: 202.158.214.106
80] Err http://au.archive.ubuntu.com trusty/universe amd64 Packages
404 Not Found [IP: 202.158.214.106 80] Err
http://au.archive.ubuntu.com trusty/multiverse amd64 Packages 404
Not Found [IP: 202.158.214.106 80] Err http://au.archive.ubuntu.com
trusty/main i386 Packages 404 Not Found [IP: 202.158.214.106 80]
Err http://au.archive.ubuntu.com trusty/restricted i386 Packages 404
Not Found [IP: 202.158.214.106 80] Err http://au.archive.ubuntu.com
trusty/universe i386 Packages 404 Not Found [IP: 202.158.214.106
80] Err http://au.archive.ubuntu.com trusty/multiverse i386 Packages
404 Not Found [IP: 202.158.214.106 80] Err
http://au.archive.ubuntu.com trusty-updates/main Sources 404 Not
Found [IP: 202.158.214.106 80] Err http://au.archive.ubuntu.com
trusty-updates/restricted Sources 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-updates/universe Sources 404 Not Found [IP: 202.158.214.106
80] Err http://au.archive.ubuntu.com trusty-updates/multiverse Sources
404 Not Found [IP: 202.158.214.106 80] Err
http://au.archive.ubuntu.com trusty-updates/main amd64 Packages 404
Not Found [IP: 202.158.214.106 80] Err http://au.archive.ubuntu.com
trusty-updates/restricted amd64 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-updates/universe amd64 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-updates/multiverse amd64 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-updates/main i386 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-updates/restricted i386 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-updates/universe i386 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-updates/multiverse i386 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-backports/main Sources 404 Not Found [IP: 202.158.214.106
80] Err http://au.archive.ubuntu.com trusty-backports/restricted
Sources 404 Not Found [IP: 202.158.214.106 80] Err
http://au.archive.ubuntu.com trusty-backports/universe Sources 404
Not Found [IP: 202.158.214.106 80] Err http://au.archive.ubuntu.com
trusty-backports/multiverse Sources 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-backports/main amd64 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-backports/restricted amd64 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-backports/universe amd64 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-backports/multiverse amd64 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-backports/main i386 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-backports/restricted i386 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-backports/universe i386 Packages 404 Not Found [IP:
202.158.214.106 80] Err http://au.archive.ubuntu.com trusty-backports/multiverse i386 Packages 404 Not Found [IP:
202.158.214.106 80] Fetched 3,616 B in 4min 28s (13 B/s) W: GPG error: http://repository.spotify.com stable InRelease: The following
signatures couldn't be verified because the public key is not
available: NO_PUBKEY 13B00F1FD2C19886 W: GPG error:
http://ppa.launchpad.net trusty Release: The following signatures
couldn't be verified because the public key is not available:
NO_PUBKEY 4DF9B28CA252A784 W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/main/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/restricted/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/universe/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/multiverse/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/main/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/restricted/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/universe/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/multiverse/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/main/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/restricted/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/universe/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty/multiverse/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/restricted/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/multiverse/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/restricted/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/multiverse/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/restricted/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-updates/multiverse/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/main/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/restricted/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/universe/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/multiverse/source/Sources
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/main/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/restricted/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/universe/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/multiverse/binary-amd64/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/main/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/restricted/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/universe/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
W: Failed to fetch
http://au.archive.ubuntu.com/ubuntu/dists/trusty-backports/multiverse/binary-i386/Packages
404 Not Found [IP: 202.158.214.106 80]
E: Some index files failed to download. They have been ignored, or old
ones used instead.
答案1
http://au.archive.ubuntu.com已关闭，并且由于某些古怪的原因，在 redhat 服务器上运行:)
现在切换到不同的镜像或稍后重试。
在仪表盘中搜索“软件”，然后点击软件与更新。
点击下拉菜单下载自并选择其他。
然后点击选择最佳服务器自动选择最佳服务器，或者您也可以点击主服务器但可能不会那么快。
您可以在这里联系镜像的维护者http://aarnet.edu.au/contact-us/enquiry-and-feedback-form让他们知道回购已经停止。
更新：
http://au.archive.ubuntu.com 似乎已再次备份并且软件更新程序应该可以正常运行。
答案2
你可以尝试这个：
enter the terminal
and type this: sudo bash
gedit /etc/atp/sources.list
然后执行此操作
put ## in front of src http://au.archive.ubuntu.com etc..
您可能可以再次更新，这样它可能会正常工作。