Hi, I'm afraid I didn't get the point with NIS. I installed the nis.deb on all our machines on the local network and followed the instructions in /usr/doc/nis/nis.debian.howto carefully: setting up a master and the clients.
But how do I proceed? How to add a user to the NIS database? I tried with 'adduser' on both the server and the clients, but without results, as the first was rejected ("adduser: `groupadd -g 1007 joachim' returned error code 2304. Aborting. Cleaning upp."), and the second gave me only a local account. Hoping for help, joachim