我正在运行 ubuntu 12.04
每当我尝试 apt-get install/upgrade 时，我都会收到大量“500 内部服务器错误”错误。aptitude 也会产生完全相同的错误。我知道网上应该有“无数”关于这个问题的帖子，但它们似乎都对我不起作用。其中大多数似乎与安装特定软件包有关，但我得到了错误每当我使用 apt-get 或 aptitude
我知道这应该是一个一般错误，但 /var/log/apt 文件夹中没有任何内容提供任何信息，甚至没有确认该错误。（其中仅有的两个文件是 term.log 和 history.log）。
根据一些人的建议，我修改了 /etc/apt/sources.list 文件，以便前三行
deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ precise main restricted universe multiverse
deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse
deb http://us-west-1.ec2.archive.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse
但这些也会产生错误。
有人可以根据这些信息提出建议，或者建议我如何获得更具信息量的错误描述吗？
提前感谢帮助
以下是我从 apt-get upgrade 中得到的一些错误
Err http://archive.canonical.com precise/partner amd64 Packages 500 Internal Server Error
Err http://archive.canonical.com precise/partner i386 Packages 500 Internal Server Error
Err http://archive.canonical.com precise/partner Sources 500 Internal Server Error
Err http://dl.google.com stable/main amd64 Packages 500 Internal Server Error
Err http://dl.google.com stable/main i386 Packages 500 Internal Server Error
Err http://extras.ubuntu.com precise/main amd64 Packages 500 Internal Server Error
Err http://extras.ubuntu.com precise/main i386 Packages 500 Internal Server Error
Err http://extras.ubuntu.com precise/main Sources 500 Internal Server Error
Err http://ppa.launchpad.net precise/main amd64 Packages 500 Internal Server Error
Err http://ppa.launchpad.net precise/main i386 Packages 500 Internal Server Error
Err http://ppa.launchpad.net precise/main Sources 500 Internal Server Error
Err http://security.ubuntu.com precise-security/main amd64 Packages 500 Internal Server Error
Err http://security.ubuntu.com precise-security/main i386 Packages 500 Internal Server Error
Err http://security.ubuntu.com precise-security/main Sources 500 Internal Server Error
Err http://security.ubuntu.com precise-security/multiverse amd64 Packages 500 Internal Server Error
Err http://security.ubuntu.com precise-security/multiverse i386 Packages 500 Internal Server Error
Err http://security.ubuntu.com precise-security/multiverse Sources 500 Internal Server Error
Err http://security.ubuntu.com precise-security/restricted amd64 Packages 500 Internal Server Error
Err http://security.ubuntu.com precise-security/restricted i386 Packages 500 Internal Server Error
Err http://security.ubuntu.com precise-security/restricted Sources 500 Internal Server Error
...
Err http://us-west-1.ec2.archive.ubuntu.com precise/main amd64 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise/main i386 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise/multiverse amd64 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise/multiverse i386 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise/restricted amd64 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise/restricted i386 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise-security/main amd64 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise-security/main i386 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise-security/multiverse amd64 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise-security/multiverse i386 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise-security/restricted amd64 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise-security/restricted i386 Packages 500 Internal Server Error
Err http://us-west-1.ec2.archive.ubuntu.com precise-security/universe amd64 Packages 500 Internal Server Error
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答案1
所以我的问题是我设置了一个环境变量，该变量内置于我的登录脚本中。
setenv http_proxy http://proxy.lib.berkeley.edu:7777/proxy.pac
这是一次连接到我的图书馆的徒劳尝试，因为 chrome 不允许您设置代理连接。（它不起作用）。
如果 apt-get 提供任何诊断输出，我早就知道了。但是它没有（在未来的版本中它将是伟大的如果提供了详细选项。）
感谢@gertfdijk 的帮助，我尝试了以下
wget "http://security.ubuntu.com/ubuntu/dists/precise-security/Release.gpg"
它为我提供了追踪错误所需的诊断信息。