I love Printopia - this allows my iDevices to print to a printer attached to my Mac. The problem is I usually don't leave it on all the time. Whenever I want to print from my phone, I'd turn it on via System Preferences app.
Question: is it possible to do so via command line? This way I can ssh in my Mac and turn it on/off (or even better, write some simple script to automate the process).