在终端中输入 sudo apt-get update 后，出现以下错误：
Reading package lists... Done
W: The repository 'http://dl.bintray.com/aluxian/deb stable 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://dl.bintray.com/aluxian/deb/dists/stable/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.