Failed to fetch HttpError404

Hi all.

I cannot install docker on my vagrant localhost machine (v5).

I followed the steps here:

And after I enter the command in step 4, on step 5 I type sudo apt-get update, the following error happen:

Get:21 jessie/stable amd64 Packages [586 B]
Err jessie/stable amd64 Packages
Fetched 144 kB in 5s (26.5 kB/s)
W: Failed to fetch  HttpError404

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

And this link: actually return a 404 not found error.

I am using vagrant php-dev image.

Can anyone tell me how to solve this problem?

Thank you very much.