Using Xrootd

...

from ROOT

   TFile *f = TFile::Open("root://glast-rdr//wilko/test/basic.root")
will load TXnetFile automatically

...

requires that the library (Netx.so) that contains TXNetFile has to be loaded first.   

Using Xrootd client command line tools

xrdcp:   Copy files to and from XROOTD