尝试从终端更新时收到此错误消息:
Reading package lists... Done
W: The repository 'http://ppa.launchpad.net/ffmulticonverter/stable/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/ffmulticonverter/stable/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
它指的是一个特定的应用程序,但整个更新变得无用(我猜是由于这个错误)。
任何想法发生了什么以及为什么我不能更新我的操作系统?图形更新也不起作用。