How can I launch an Android program from terminal?

I've played with apkd-launcher, but I don't understand what to do.

"Usage: apkd-launcher <apkfile> <package>/<activity>"

How can I find which activity to request?

The program I'm trying to run is XServer-XSDL, installed from Google Play.
The .apk file appears to be located at /opt/alien/data/app/x.org.server-1.apk