XenServer client problems
XenServer only provide a client as a .RPM or even worse a .MSI ! So if you'e running ed/x/ubuntu you'll need to install and run alien to convert the .RPM to .DEB and then run
# dpkg -i xe-cli_5.0.0-13193_i386.deb.
When you try and run # xe you may then get the error
Please install the stunnel package or define the XE_STUNNEL environment variable to point to the binary.
Time to install a CentOS VM to run XE i guess !