我使用 Software Sources 程序添加了一些额外的存储库。但是当我重新加载包数据库时,出现如下错误:
W:GPG 错误:http : //ppa.launchpad.net trusty InRelease:以下签名无法验证,因为公钥不可用:NO_PUBKEY 8BAF9A6F
apt-key根据官方的 Ubuntu 文档,我知道我可以在终端中修复它。但我希望以图形方式进行。有没有办法在不使用终端的情况下做到这一点?
可能重复:
如何修复 GPG 错误“NO_PUBKEY”?
在sudo apt-get update我收到此错误后:
W: GPG error: http://archive.hivemind.me all Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 3C962022012520A0
Run Code Online (Sandbox Code Playgroud) 当我运行更新时,出现以下错误。
GPG error: http://cran.wustl.edu maverick/ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 51716619E084DAB9
Run Code Online (Sandbox Code Playgroud)
因此,我运行了以下代码并收到以下错误消息:
$ gpg --keyserver subkeys.pgp.net --recv 51716619E084DAB9
gpg: requesting key E084DAB9 from hkp server subkeys.pgp.net
gpg: key E084DAB9: "Michael Rutter <marutter@gmail.com>" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
Run Code Online (Sandbox Code Playgroud)
我如何设置一个有效的公钥或者我可以做些什么来解决这个问题?
When trying to install packages through the software updater on Ubuntu 14.04.1 LTS I get following error:

It's about these packages:

I have selected following settings from where to install updates from:

I have run following commands:
sudo apt-get clean
sudo apt-get update
sudo apt-get upgrade
Run Code Online (Sandbox Code Playgroud)
sudo apt-get update gives following output:
Reading package lists... Done
W: GPG error: https://download.01.org trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A902DDA375E52366
W: Duplicate sources.list …Run Code Online (Sandbox Code Playgroud) 我正在使用 Ubuntu 12.10。当我尝试更新软件时,它显示了这个错误:
Requires installation of untrusted packages
This requires installing packages from unauthenticated sources.
Details
kalzium-data kanagram kate-data kde-l10n-engb kde-l10n-zhcn kde-runtime-data kdegames-data klettres-data libakonadi-kabc4 liblxc0 libwildmidi-config libwildmidi1 lxc marble-data nepomuk-core-data parley-data tomboy
Run Code Online (Sandbox Code Playgroud)