This shell script is part of the dtc-xen package, generally to be used by the dtc panel to install a new a Xen VPS server. This script is used only to be able to test the SOAP server of DTC-Xen.
The below will start the VPS called xen01 using the command "xm create xen01"
dtc-xen-client https://dtc-xen:firstname.lastname@example.org:8089/ startVPS xen01
See http://www.gplhost.com/software-dtc-xen.html for updates.