So, I had an old computer lying around a few weeks ago, so I figured I'd put to good use, and installed Ubuntu and a VNC software on it, stuck it in my basement, and gave my family connection information.

It's been working well, but I want a way for my family members to go somewhere on my site (or something of the likes) and upload files to the server, and view/download files from the server. It's not set up as an actual FTP server, but if it was I could do this.

So, what I'm asking is, how can I set this desktop up as an actual FTP server?