This is particularly useful if {HEAD ~ the user} of {TAIL ~ the machine} does not have a user identifying information suitable for authentication 
This is particularly useful if { HEAD ~ the user } of { TAIL ~ the machine } does not have a user identifying information suitable for authentication
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH