这是一个创建于 2915 天前的主题，其中的信息可能已经有所发展或是发生改变。
最近在折腾发行版升级（ precise -> trusty ），今早升完几台机器，继续操作其他机器时发现 do-release-upgrade 一直报 404 Not Found 错误。
~# do-release-upgrad
Checking for a new Ubuntu release
Err Upgrade tool signature
404 Not Found [IP: 23.251.96.133 80]
Err Upgrade tool
404 Not Found [IP: 23.251.96.133 80]
Fetched 0 B in 0s (0 B/s)
WARNING:root:file 'trusty.tar.gz.gpg' missing
Failed to fetch
Fetching the upgrade failed. There may be a n etwork problem.
然后我找到 /var/lib/update-manager/meta-release-lts 这个文件查了内容，发现里面的 URL 用浏览器直接访问或者 wget 也是 404 ，这个文件的内容在今早成功升级的机器，和现在没法升级的机器上，都是一致的。
Dist: trusty
Name: Trusty Tahr
Version: 14.04.5 LTS
Date: Thu, 17 Apr 2014 14:04:00 UTC
Supported: 1
Description: This is the 14.04.5 LTS release
Release-File: http://archive.ubuntu.com/ubuntu/dists/trusty/Release
ReleaseNotes: http://archive.ubuntu.com/ubuntu/dists/trusty-updates/main/dist-upgrader-all/current/ReleaseAnnouncement
ReleaseNotesHtml: http://archive.ubuntu.com/ubuntu/dists/trusty-updates/main/dist-upgrader-all/current/ReleaseAnnouncement.html
UpgradeTool: http://archive.ubuntu.com/ubuntu/dists/trusty-updates/main/dist-upgrader-all/current/trusty.tar.gz
UpgradeToolSignature: http://archive.ubuntu.com/ubuntu/dists/trusty-updates/main/dist-upgrader-all/current/trusty.tar.gz.gpg
公司内的镜像源因为每天同步几次官方源，在去查相应路径时发现对应的目录也已经是空的了。
这是药丸啊…
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1
imn1 2016-11-15 11:47:42 +08:00
23.251.96.133 80
这个像是 CDN ？ V2EX 服务器也用过这个 ip |
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2
imn1 2016-11-15 11:49:59 +08:00
我浏览器点上面的链接没问题，是 91.189.88.162
十几分钟前才 update 了 bash on ubuntu on windows ，也没问题 |
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4
BOYPT 2016-11-15 13:31:42 +08:00
官方源挂了还有千千万万的源啊
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