I have a powerful computer in the lab and I installed Ubuntu 11.10 64-bit on it. I want to install an SSH server on it, so I can reach it from home and even from my Android via ssh. But I haven't got any experience on creating an ssh server.
The machine has a dynamic IP. I don't want any other ssh users, installing it only for myself will be enough for me.
Where should I start? What tools do I need and how would I configure them?