apt update由于找不到存储库而失败。它产生以下日志。
Hit:2 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:3 http://ca.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:4 http://packages.microsoft.com/repos/code stable InRelease
Hit:5 http://ca.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:6 http://security.ubuntu.com/ubuntu focal-security InRelease
Ign:7 http://ppa.launchpad.net/kasra-mp/ubuntu-indicator-weather/ubuntu focal InRelease
Err:8 http://ppa.launchpad.net/kasra-mp/ubuntu-indicator-weather/ubuntu focal Release
404 Not Found [IP: 91.189.95.85 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/kasra-mp/ubuntu-indicator-weather/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. …