GPG签名无效

我在以下方面遇到了问题（为了删除超链接，我从地址中删除了一个“ /”）：

W: GPG error: http://archive.ubuntu.com oneiric Release: The following signatures were   invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>

W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG B725097B3ACC3965 Launchpad lffl

W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG 4874D3686E80C6B7 Launchpad PPA for Banshee Team

W: GPG error: http://archive.getdeb.net jaunty-getdeb Release: The following signatures were invalid: BADSIG A8A515F046D7E7CF GetDeb Archive Automatic Signing Key <archive@getdeb.net>

W: GPG error: http://badgerports.org lucid Release: The following signatures were invalid: BADSIG C90F9CB90E1FAD0C Jo Shields <directhex@apebox.org>

W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG 976B5901365C5CA1 Launchpad PPA for transmissionbt

W: Failed to fetch http://ppa.launchpad.net/dlecan/openjdk/ubuntu/dists/oneiric/main/source/Sources  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/dlecan/openjdk/ubuntu/dists/oneiric/main/binary-i386/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/sevenmachines/flash/ubuntu/dists/oneiric/main/binary-i386/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/sun-java-community-team/sun-java6/ubuntu/dists/oneiric/main/source/Sources  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/sun-java-community-team/sun-java6/ubuntu/dists/oneiric/main/binary-i386/Packages  404  Not Found

我尝试了以下解决方案，这些解决方案在一个封闭的案例中显示为“以下签名无效”：

First of all try

sudo apt-get clean

sudo apt-get update && sudo apt-get upgrade

Some ISPs cache the packages and errors like these are reported then. 
If the above commands don't work, try

sudo apt-get update -o Acquire::http::No-Cache=True

and again

sudo apt-get update && sudo apt-get upgrade

If it still doesn't work,

sudo apt-get update -o Acquire::BrokenProxy=true 

sudo apt-get update && sudo apt-get upgrade

试试这个：

sudo apt-get clean
cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get clean
sudo apt-get update

您安装了一组“有趣的” PPA：

遵循以下问答可以解决一个人的报告BADSIG：

解决apt-get BADSIG GPG错误的最简单方法是什么？

404错误基本上意味着那些PPA不再具有Oneiric存储库。您应该从软件来源中取消勾选。

在轻松活泼，getdeb＆badgerports.org 库不适用于precise中。同样，从软件来源中取消选中那些。

我得到了“ Y PPA经理”。该软件中有一个“高级”按钮，可以找到丢失的密钥。为我工作。

我遇到过同样的问题。我只是取消选中软件源下的“由第三方软件开发人员提供的独立”和“由第三方软件开发人员提供的独立（源代码）”复选框（单击主面板上的齿轮图标，然后单击软件updater。在左下方是设置按钮，它将带您进入软件源对话框。到达此处时，只需移至“其他软件”标签）