When a new user is added (using adduser) the files need to be
copied to each of the other hosts. A simple way is to tar up the
files, copy them to a NFS mounted are (e.g., a trusted user's home
directory), log in as root on the other host, cp the tar file to /tmp
so that root can access it (root access to the NFS mounted home
directories is not permitted) and then untar it in /etc.
This is okay for a small network! It also relies on /home being
mounted by NFS from the master (altrop). Still, I need a better
solution.