Nfs -- root privs

[Guy Harris]

 >>For example, export /usr to host1 read-only and map root to -2, but export
 >>/usr to host2 read-write and map root to 0 [Sun: hint, hint].
 >
 >Check out SunOS 4.x, where in /etc/exports you can specify a "root"
 >option which lists the nodes to which you're giving root equivalence
 >access for a particular filesystem ...

... and an "rw" option which lists the nodes to which you're giving
read-write access for a particular filesystem.