RT-11 Help

Finally.... Jacksonville pays off.... Do you know who many times I've seen computer x available in y, for pickup only, where y does not equal Jacksonville. I've got two SMS 1000s comming this weekend, a model 50 and 40, and two expansion boxes (41's ???) full of serial io running RT-11 for a defunct cardkey system. I dont know RT-11 (yet.) and am looking forward to the experience. But before that happens the seller wants to purge some sensitive employee files on the system. Can someone tell me how to tell him to 1) move through the directory structure, and 2) how to delete specific files ( some that span partitions 0 - du4 according to him ), and... Where can I find a good source of RT-11 info? Thanks - Mike: dogas(a)leading.net