It is not possible. You can select, insert, update and delete (with proper linkage and permissions of course) but if you attempt a truncate statement you will receive the following error:
Server: Msg 117, Level 15, State 1, Line 1
The object name 'mylinkedserver.tempdb.dbo.' contains more than the maximum number of prefixes. The maximum is 2.
based on the following SQL statement:
truncate table mylinkedserver.tempdb.dbo.t1
RegardsRudy KomacsarSenior Database Administrator"Ave Caesar! - Morituri te salutamus."