To upload files to this server (for downloading by anyone on the Web), you need a useraccount and a personal, secret password. To get this, send an email to Knut Staring, knutst (AT) gmail.com
Once you have an account, you can login using any ssh client, and transfer files using an sftp client. Here is one piece of software that combines the two:
Installing this will give you a shortcut to each of the two clients (shell and file transfer), but you should notice that once one is open, you have one-click access to the other on the menu.
When logging in, you will be in /home/