Something new to work on

I love linux. I set up a cups server and I have done some other things like try to get a web server up and I am looking for something new and interesting to do with my secondary linux box. any suggestions? I am a newb as you might have understood so...answer accordingly

Learn how to write makefiles. Set up an Apache server. SFTP server. Local Git repos. Torrent box. BTC miner

If you use Firefox you could set up a Firefox sync server rather than using Mozilla's.