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无法下载所有存储库索引（Synaptic）（终端）

tag-icon • tag-icon package-management updates repository synaptic
无法下载所有存储库索引（Synaptic）（终端）

在 synaptic 中：无法下载所有存储库索引

由于网络问题，存储库可能不再可用或无法连接。如果可用，将使用失败索引的旧版本。否则将忽略存储库。请检查您的网络连接，并确保首选项中的存储库地址正确。

The repository 'http://ppa.launchpad.net/george-edison55/cmake-3.x/ubuntu focal Release' does not have a Release file.

在终端中：

rinka@ThinkCentre-M91-RINKA:~$ sudo apt-get update && sudo apt-get upgrade
[sudo] password for rinka: 
Hit:1 https://repo.steampowered.com/steam stable InRelease
Hit:2 https://repo.steampowered.com/steam beta InRelease                       
Hit:3 http://archive.canonical.com/ubuntu focal InRelease                      
Ign:4 http://ppa.launchpad.net/george-edison55/cmake-3.x/ubuntu focal InRelease
Hit:5 http://security.ubuntu.com/ubuntu focal-security InRelease               
Hit:6 http://ph.archive.ubuntu.com/ubuntu focal InRelease                      
Hit:7 http://ph.archive.ubuntu.com/ubuntu focal-updates InRelease              
Err:8 http://ppa.launchpad.net/george-edison55/cmake-3.x/ubuntu focal Release
  404  Not Found [IP: 91.189.95.85 80]
Get:9 http://ph.archive.ubuntu.com/ubuntu focal-backports InRelease [101 kB]
Hit:10 https://repo.protonvpn.com/debian stable InRelease
Reading package lists... Done                            
E: The repository 'http://ppa.launchpad.net/george-edison55/cmake-3.x/ubuntu focal Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

答案1

从软件和更新设置中删除“ppa.launchpad.net/george-edison55/cmake-3.x/ubuntu”

然后在终端上输入：

sudo apt autoremove

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