[mistwang]

You can change your vhost root to "/home/test/", set document root to "/home/test/app/current/", change the "Rails" context location to "/home/test/app/current/" as well.
This way, you can set awstats working directory to a real directory at "/home/test/awstats".

You need to instantiate the vhost configuration first if you are using the vhost template.

Just a simple configuration change.