有人知道为什么会出现 404 错误吗？在这些路径上，有{path}.gz和 ，{path}.bz2我可以用 wget 成功获取。
vagrant@mt-repl:/tmp$ sudo apt-get update
Ign http://security.ubuntu.com trusty-security InRelease
Ign http://archive.ubuntu.com trusty InRelease
Ign http://security.ubuntu.com trusty-security Release.gpg
Ign http://security.ubuntu.com trusty-security Release
Ign http://archive.ubuntu.com trusty-updates InRelease
Ign http://archive.ubuntu.com trusty Release.gpg
Ign http://archive.ubuntu.com trusty-updates Release.gpg
Ign http://archive.ubuntu.com trusty Release
Ign http://archive.ubuntu.com trusty-updates Release
Err http://security.ubuntu.com trusty-security/main Sources
404 Not Found
Err http://security.ubuntu.com trusty-security/universe Sources
404 Not Found
Err http://security.ubuntu.com trusty-security/main amd64 Packages
404 Not Found
Err http://security.ubuntu.com trusty-security/universe amd64 Packages
404 Not Found
Ign http://security.ubuntu.com trusty-security/main Translation-en_US
Ign http://security.ubuntu.com trusty-security/main Translation-en
Ign http://security.ubuntu.com trusty-security/universe Translation-en_US
Ign http://security.ubuntu.com trusty-security/universe Translation-en
Err http://archive.ubuntu.com trusty/main Sources
404 Not Found
Err http://archive.ubuntu.com trusty/universe Sources
404 Not Found
Err http://archive.ubuntu.com trusty/main amd64 Packages
404 Not Found
Err http://archive.ubuntu.com trusty/universe amd64 Packages
404 Not Found
Ign http://archive.ubuntu.com trusty/main Translation-en_US
Ign http://archive.ubuntu.com trusty/main Translation-en
Ign http://archive.ubuntu.com trusty/universe Translation-en_US
Ign http://archive.ubuntu.com trusty/universe Translation-en
Err http://archive.ubuntu.com trusty-updates/main Sources
404 Not Found
Err http://archive.ubuntu.com trusty-updates/universe Sources
404 Not Found
Err http://archive.ubuntu.com trusty-updates/main amd64 Packages
404 Not Found
Err http://archive.ubuntu.com trusty-updates/universe amd64 Packages
404 Not Found
Ign http://archive.ubuntu.com trusty-updates/main Translation-en_US
Ign http://archive.ubuntu.com trusty-updates/main Translation-en
Ign http://archive.ubuntu.com trusty-updates/universe Translation-en_US
Ign http://archive.ubuntu.com trusty-updates/universe Translation-en
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/main/source/Sources 404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/universe/source/Sources 404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/universe/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/main/source/Sources 404 Not Found
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/universe/source/Sources 404 Not Found
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/universe/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/main/source/Sources 404 Not Found
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/source/Sources 404 Not Found
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
这是我的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://archive.ubuntu.com/ubuntu trusty main
deb-src http://archive.ubuntu.com/ubuntu trusty main
## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu trusty-updates main
deb-src http://archive.ubuntu.com/ubuntu trusty-updates main
## 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
## Uncomment the following two lines to add software from the 'backports'
## repository.
## 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
## 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
deb http://security.ubuntu.com/ubuntu trusty-security main
deb-src http://security.ubuntu.com/ubuntu trusty-security main
deb http://security.ubuntu.com/ubuntu trusty-security universe
deb-src http://security.ubuntu.com/ubuntu trusty-security universe
# deb http://security.ubuntu.com/ubuntu trusty-security multiverse
# deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse
它是一个使用以下方式构建的 vagrant boxhttps://vagrantcloud.com/ubuntu/boxes/trusty64
答案1
我使用了代理。我已将 apt-get 配置为使用代理，但代理 URL 末尾有一个斜杠。
对于某些事情，例如获取来源列表，这很有效。但对于下载实际的工件，这会导致问题。
解决方案是从代理 URL 中删除尾随的斜杠。