This command was working recently, now I get the following error:
Failed to fetch http://us-east-1.ec2.archive.ubuntu.com/ubuntu/pool/main/t/texlive-extra/texlive-latex-extra-doc_2013.20140215-2_all.deb Connection failed
When you created your account, you perhaps missed the big box that clearly stated “This is not a support forum”. The box was not kidding, sorry.
See https://community.ubuntu.com/t/finding-help/712 for Ubuntu support.
FYI, when I try that link, it works exactly as expected. It might not be an Ubuntu problem at all.