cat /etc/issue
Ubuntu 14.04.1 LTS \n \l
我在执行时收到以下错误sudo apt-get update，我已sudo apt-get dist-upgrade按建议尝试这里但似乎没有什么可以解决这个问题。从阅读与此问题相关的其他问题来看，Ubuntu 版本不再受支持，但我正在运行最新版本的 Ubuntu。
Ign http://au.archive.ubuntu.com trusty InRelease
Ign http://au.archive.ubuntu.com trusty-updates InRelease
Ign http://au.archive.ubuntu.com trusty-backports InRelease
Ign http://dl.google.com stable InRelease
Ign http://au.archive.ubuntu.com trusty-security InRelease
Hit http://au.archive.ubuntu.com trusty Release.gpg
Hit http://au.archive.ubuntu.com trusty-updates Release.gpg
Hit http://au.archive.ubuntu.com trusty-backports Release.gpg
Hit http://dl.google.com stable Release.gpg
Hit http://au.archive.ubuntu.com trusty-security Release.gpg
Hit http://au.archive.ubuntu.com trusty Release
Hit http://au.archive.ubuntu.com trusty-updates Release
Hit http://au.archive.ubuntu.com trusty-backports Release
Hit http://dl.google.com stable Release
Hit http://au.archive.ubuntu.com trusty-security Release
Hit http://apt.insynchq.com trusty InRelease
Hit http://au.archive.ubuntu.com trusty/main Sources
Ign http://archive.ubuntu.com main InRelease
Ign http://extras.ubuntu.com trusty InRelease
Ign http://archive.canonical.com trusty InRelease
Ign http://ppa.launchpad.net trusty InRelease
Hit http://au.archive.ubuntu.com trusty/restricted Sources
Hit http://au.archive.ubuntu.com trusty/universe Sources
Hit http://dl.google.com stable/main amd64 Packages
Hit http://au.archive.ubuntu.com trusty/multiverse Sources
Hit http://au.archive.ubuntu.com trusty/main amd64 Packages
Hit http://au.archive.ubuntu.com trusty/restricted amd64 Packages
Hit http://au.archive.ubuntu.com trusty/universe amd64 Packages
Hit http://dl.google.com stable/main i386 Packages
Hit http://apt.insynchq.com trusty/non-free amd64 Packages
Ign http://archive.ubuntu.com main Release.gpg
Hit http://extras.ubuntu.com trusty Release.gpg
Hit http://au.archive.ubuntu.com trusty/multiverse amd64 Packages
Hit http://archive.canonical.com trusty Release.gpg
Ign http://ppa.launchpad.net trusty InRelease
Hit http://au.archive.ubuntu.com trusty/main i386 Packages
Hit http://au.archive.ubuntu.com trusty/restricted i386 Packages
Hit http://au.archive.ubuntu.com trusty/universe i386 Packages
Hit http://au.archive.ubuntu.com trusty/multiverse i386 Packages
Hit http://au.archive.ubuntu.com trusty/main Translation-en_AU
Hit http://apt.insynchq.com trusty/contrib amd64 Packages
Hit http://au.archive.ubuntu.com trusty/main Translation-en
Ign http://archive.ubuntu.com main Release
Hit http://au.archive.ubuntu.com trusty/main Translation-en_GB
Hit http://extras.ubuntu.com trusty Release
Hit http://archive.canonical.com trusty Release
Ign http://ppa.launchpad.net trusty InRelease
Hit http://au.archive.ubuntu.com trusty/multiverse Translation-en_AU
Hit http://au.archive.ubuntu.com trusty/multiverse Translation-en
Hit http://au.archive.ubuntu.com trusty/multiverse Translation-en_GB
Hit http://au.archive.ubuntu.com trusty/restricted Translation-en_AU
Hit http://au.archive.ubuntu.com trusty/restricted Translation-en
Hit http://apt.insynchq.com trusty/non-free i386 Packages
Hit http://au.archive.ubuntu.com trusty/restricted Translation-en_GB
Hit http://au.archive.ubuntu.com trusty/universe Translation-en_AU
Ign http://ppa.launchpad.net trusty InRelease
Hit http://archive.canonical.com trusty/partner amd64 Packages
Hit http://au.archive.ubuntu.com trusty/universe Translation-en
Hit http://au.archive.ubuntu.com trusty/universe Translation-en_GB
Hit http://au.archive.ubuntu.com trusty-updates/main Sources
Hit http://au.archive.ubuntu.com trusty-updates/restricted Sources
Hit http://apt.insynchq.com trusty/contrib i386 Packages
Hit http://au.archive.ubuntu.com trusty-updates/universe Sources
Hit http://extras.ubuntu.com trusty/main amd64 Packages
Hit http://au.archive.ubuntu.com trusty-updates/multiverse Sources
Ign http://ppa.launchpad.net trusty InRelease
Hit http://archive.canonical.com trusty/partner i386 Packages
Hit http://au.archive.ubuntu.com trusty-updates/main amd64 Packages
Hit http://au.archive.ubuntu.com trusty-updates/restricted amd64 Packages
Hit http://au.archive.ubuntu.com trusty-updates/universe amd64 Packages
Hit http://au.archive.ubuntu.com trusty-updates/multiverse amd64 Packages
Hit http://au.archive.ubuntu.com trusty-updates/main i386 Packages
Hit http://au.archive.ubuntu.com trusty-updates/restricted i386 Packages
Hit http://au.archive.ubuntu.com trusty-updates/universe i386 Packages
Hit http://extras.ubuntu.com trusty/main i386 Packages
Hit http://au.archive.ubuntu.com trusty-updates/multiverse i386 Packages
Ign http://ppa.launchpad.net trusty InRelease
Hit http://au.archive.ubuntu.com trusty-updates/main Translation-en
Hit http://au.archive.ubuntu.com trusty-updates/multiverse Translation-en
Hit http://au.archive.ubuntu.com trusty-updates/restricted Translation-en
Hit http://au.archive.ubuntu.com trusty-updates/universe Translation-en
Hit http://au.archive.ubuntu.com trusty-backports/main Sources
Hit http://au.archive.ubuntu.com trusty-backports/restricted Sources
Hit http://au.archive.ubuntu.com trusty-backports/universe Sources
Ign http://ppa.launchpad.net trusty InRelease
Hit http://au.archive.ubuntu.com trusty-backports/multiverse Sources
Hit http://au.archive.ubuntu.com trusty-backports/main amd64 Packages
Hit http://au.archive.ubuntu.com trusty-backports/restricted amd64 Packages
Hit http://au.archive.ubuntu.com trusty-backports/universe amd64 Packages
Hit http://au.archive.ubuntu.com trusty-backports/multiverse amd64 Packages
Hit http://au.archive.ubuntu.com trusty-backports/main i386 Packages
Hit http://au.archive.ubuntu.com trusty-backports/restricted i386 Packages
Hit http://ppa.launchpad.net trusty Release.gpg
Ign http://archive.canonical.com trusty/partner Translation-en
Hit http://au.archive.ubuntu.com trusty-backports/universe i386 Packages
Hit http://au.archive.ubuntu.com trusty-backports/multiverse i386 Packages
Hit http://au.archive.ubuntu.com trusty-backports/main Translation-en
Ign http://dl.google.com stable/main Translation-en_AU
Hit http://au.archive.ubuntu.com trusty-backports/multiverse Translation-en
Hit http://au.archive.ubuntu.com trusty-backports/restricted Translation-en
Hit http://au.archive.ubuntu.com trusty-backports/universe Translation-en
Hit http://au.archive.ubuntu.com trusty-security/main Sources
Ign http://dl.google.com stable/main Translation-en
Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://au.archive.ubuntu.com trusty-security/restricted Sources
Hit http://au.archive.ubuntu.com trusty-security/universe Sources
Hit http://au.archive.ubuntu.com trusty-security/multiverse Sources
Ign http://dl.google.com stable/main Translation-en_GB
Hit http://au.archive.ubuntu.com trusty-security/main amd64 Packages
Hit http://au.archive.ubuntu.com trusty-security/restricted amd64 Packages
Hit http://au.archive.ubuntu.com trusty-security/universe amd64 Packages
Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://au.archive.ubuntu.com trusty-security/multiverse amd64 Packages
Hit http://au.archive.ubuntu.com trusty-security/main i386 Packages
Hit http://au.archive.ubuntu.com trusty-security/restricted i386 Packages
Hit http://au.archive.ubuntu.com trusty-security/universe i386 Packages
Hit http://au.archive.ubuntu.com trusty-security/multiverse i386 Packages
Hit http://au.archive.ubuntu.com trusty-security/main Translation-en
Hit http://au.archive.ubuntu.com trusty-security/multiverse Translation-en
Hit http://au.archive.ubuntu.com trusty-security/restricted Translation-en
Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://au.archive.ubuntu.com trusty-security/universe Translation-en
Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://ppa.launchpad.net trusty Release.gpg
Hit http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty Release
Ign http://extras.ubuntu.com trusty/main Translation-en_AU
Ign http://extras.ubuntu.com trusty/main Translation-en
Hit http://ppa.launchpad.net trusty Release
Ign http://extras.ubuntu.com trusty/main Translation-en_GB
Hit http://ppa.launchpad.net trusty Release
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
Ign http://apt.insynchq.com trusty/contrib Translation-en_AU
Hit http://ppa.launchpad.net trusty/main amd64 Packages
Ign http://apt.insynchq.com trusty/contrib Translation-en
Hit http://ppa.launchpad.net trusty/main i386 Packages
Ign http://apt.insynchq.com trusty/contrib Translation-en_GB
Ign http://apt.insynchq.com trusty/non-free Translation-en_AU
Hit http://ppa.launchpad.net trusty/main Translation-en
Ign http://apt.insynchq.com trusty/non-free Translation-en
Hit http://ppa.launchpad.net trusty/main amd64 Packages
Ign http://apt.insynchq.com trusty/non-free Translation-en_GB
Hit http://ppa.launchpad.net trusty/main i386 Packages
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
Err http://archive.ubuntu.com main/universe amd64 Packages
404 Not Found [IP: 91.189.92.200 80]
Err http://archive.ubuntu.com main/restricted amd64 Packages
404 Not Found [IP: 91.189.92.200 80]
Err http://archive.ubuntu.com main/multiverse amd64 Packages
404 Not Found [IP: 91.189.92.200 80]
Ign http://ppa.launchpad.net trusty/main Translation-en_AU
Err http://archive.ubuntu.com main/universe i386 Packages
404 Not Found [IP: 91.189.92.200 80]
Ign http://ppa.launchpad.net trusty/main Translation-en
Err http://archive.ubuntu.com main/restricted i386 Packages
404 Not Found [IP: 91.189.92.200 80]
Ign http://ppa.launchpad.net trusty/main Translation-en_GB
Err http://archive.ubuntu.com main/multiverse i386 Packages
404 Not Found [IP: 91.189.92.200 80]
Ign http://ppa.launchpad.net trusty/main Translation-en_AU
Ign http://archive.ubuntu.com main/multiverse Translation-en_AU
Ign http://ppa.launchpad.net trusty/main Translation-en
Ign http://archive.ubuntu.com main/multiverse Translation-en
Ign http://ppa.launchpad.net trusty/main Translation-en_GB
Ign http://archive.ubuntu.com main/multiverse Translation-en_GB
Ign http://archive.ubuntu.com main/restricted Translation-en_AU
Ign http://archive.ubuntu.com main/restricted Translation-en
Ign http://archive.ubuntu.com main/restricted Translation-en_GB
Ign http://archive.ubuntu.com main/universe Translation-en_AU
Ign http://archive.ubuntu.com main/universe Translation-en
Ign http://archive.ubuntu.com main/universe Translation-en_GB
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/universe/binary-amd64/Packages 404 Not Found [IP: 91.189.92.200 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/restricted/binary-amd64/Packages 404 Not Found [IP: 91.189.92.200 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/multiverse/binary-amd64/Packages 404 Not Found [IP: 91.189.92.200 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/universe/binary-i386/Packages 404 Not Found [IP: 91.189.92.200 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/restricted/binary-i386/Packages 404 Not Found [IP: 91.189.92.200 80]
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/main/multiverse/binary-i386/Packages 404 Not Found [IP: 91.189.92.200 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
/etc/apt/sources.list
# deb cdrom:[Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release amd64 (20140722.2)]/ trusty main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://archive.ubuntu.com/ubuntu trusty main restricted
deb-src http://archive.ubuntu.com/ubuntu trusty main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu trusty-updates main restricted
deb-src http://archive.ubuntu.com/ubuntu trusty-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://archive.ubuntu.com/ubuntu trusty universe
deb-src http://archive.ubuntu.com/ubuntu trusty universe
deb http://archive.ubuntu.com/ubuntu trusty-updates universe
deb-src http://archive.ubuntu.com/ubuntu trusty-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://archive.ubuntu.com/ubuntu trusty multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty multiverse
deb http://archive.ubuntu.com/ubuntu trusty-updates multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty-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://archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu trusty-security main restricted
deb-src http://archive.ubuntu.com/ubuntu trusty-security main restricted
deb http://archive.ubuntu.com/ubuntu trusty-security universe
deb-src http://archive.ubuntu.com/ubuntu trusty-security universe
deb http://archive.ubuntu.com/ubuntu trusty-security multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty-security 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 trusty partner
# deb-src http://archive.canonical.com/ubuntu trusty partner
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu trusty main
# deb-src http://extras.ubuntu.com/ubuntu trusty main
# deb-src http://archive.ubuntu.com/ubuntu trusty main universe restricted multiverse
# deb-src http://archive.ubuntu.com/ubuntu trusty main universe restricted multiverse
deb http://archive.ubuntu.com/ubuntu main universe restricted multiverse
# deb-src http://archive.ubuntu.com/ubuntu main universe restricted multiverse
答案1
将所有弃用的 URL 更改http://archive.ubuntu.com为可用的 URLhttp://old-releases.ubuntu.com
sudo sed -i -e 's/:\/\/(archive.ubuntu.com\|security.ubuntu.com)/old-releases.ubuntu.com/g' /etc/apt/sources.list
答案2
删除以下行deb http://archive.ubuntu.com/ubuntu main universe restricted multiverse（如果需要，还可以删除其后的注释行）。然后运行sudo apt-get update。现在应该没有错误了。
答案3
首次运行sudo apt-get -y upgrade以使 apt-get 重新正确指向。
然后您可以运行以下命令：
sudo apt-get -y update
sudo apt-get -y dist-upgrade
没有收到“404 Not Found”错误。
答案4
就我而言，这是因为发行版（disco，不是 LTS 版本）已经 EOL 并且已从http://archive.ubuntu.com/ubuntu/dists
您可以检查是否有新版本可用：
sudo do-release-upgrade-c