Run command to create file of bash-completion. You need permission to write in bash-complete dir.

sudo ./yiic complete install

Now when new session is create in bash will be work autocompletion to yiic:

 
1. For application - sets of commands 1. For command - list of actions and named params for default action 1. For action - hint for his named params Original article in russian: http://habr-sandbox.livejournal.com/230319.html