我将服务器从最快的服务器更改为主服务器，同时尝试修复软件管理器的问题（不受信任的来源无法安装 FYI），但出现错误。
这是我收到的一个错误：
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:Failed to fetch http://ppa.launchpad.net/baszczewski/qtiko/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/baszczewski/qtiko/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/hakermania/format-junkie/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/hakermania/format-junkie/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/kroq-gar78/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/kroq-gar78/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/megous/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/megous/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/moka/faba-icon-theme/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/moka/faba-icon-theme/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/moka/moka-gtk-theme/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/moka/moka-gtk-theme/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/moka/moka-icon-theme/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/moka/moka-icon-theme/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/snwh/moka-gtk-theme-daily/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/snwh/moka-gtk-theme-daily/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/snwh/moka-icon-theme-daily/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/snwh/moka-icon-theme-daily/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
, E:Some index files failed to download. They have been ignored, or old ones used instead.
我尝试了当我使用 PPA 或更新我的软件包列表时，如何修复 404 错误？，但我仍然在软件更新程序中收到不受信任的来源错误。
答案1
首先安装 Y-PPA 管理器：为此您必须下载 deb 包，您不能通过 PPA 安装，因为您无法更新软件列表。
点击此链接下载 deb然后打开它并单击高级选项。
- 然后点击第二个选项（尝试导入所有缺失的 GPG 密钥），如下图所示：
- 等待一段时间。然后点击第三个选项（尝试修复所有 GPG BADSIG 错误）
您需要等待一段时间，直到它显示完成的通知！ 如果你最近升级了 Ubuntu，则必须点击“Ubuntu 升级后重新启用可用的 PPA”
然后运行
sudo apt-get update之后你可以返回到你正在尝试做的事情。