These OSes use the traditional Sun export format. In
/etc/exports
write:
/mn/eris/local -rw=apollon
The complete documentation is in the exports
man page. After
editing the file run exportfs -av
to export the filesystems.
How strict the exportfs command is about the syntax varies. On some OSes you will find that previously entered lines reads:
/mn/eris/local apollon
or even something degenerate like:
/mn/eris/local rw=apollon
I recommend being formal. You risk that the next version of
exportfs
if much stricter and then suddenly everything will stop
working.