W: Failed to fetch http://packages.microsoft.com/repos/vscode/dists/stable/main/binary-amd64/Package

W: Failed to fetch http://packages.microsoft.com/repos/vscode/dists/stable/main/binary-amd64/Packages Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones used instead.

在Ubuntu下sudo apt-get update时出现了这个bug，但我本身其实没有安装vscode，不知道为什么会有这个源。

所以我选择直接删除这个list，不去fetch它了：

cd /etc/apt/sources.list.d
sudo rm ./vscode.list

然后再sudo apt-get update即可