我的电脑无法更新，反而出现这些错误。如果可以的话，请帮忙。我的操作系统是 Ubuntu 20.04.3 Focal Fossa
Hit:1 http://nz.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://nz.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:3 http://nz.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease
Hit:5 http://ppa.launchpad.net/kdenlive/kdenlive-stable/ubuntu focal InRelease
Err:5 http://ppa.launchpad.net/kdenlive/kdenlive-stable/ubuntu focal InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2763B0EE7709FE97
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://ppa.launchpad.net/kdenlive/kdenlive-stable/ubuntu focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2763B0EE7709FE97
W: Failed to fetch http://ppa.launchpad.net/kdenlive/kdenlive-stable/ubuntu/dists/focal/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2763B0EE7709FE97
W: Some index files failed to download. They have been ignored, or old ones used instead.
当我尝试从软件更新程序更新时。
答案1
您必须使用以下命令删除并重新添加提到的 PPA：
sudo add-apt-repository -r ppa:kdenlive/kdenlive-stable
sudo add-apt-repository ppa:kdenlive/kdenlive-stable
然后安装所需的更新
sudo apt-get update
sudo apt-get upgrade