NFS Tips
  Donnie Barnes, djb@redhat.com
  V1.1, February 26, 1996

  1.  Preface

  ``Red Hat Tips'' are documentation meant to help Red Hat users with
  specific tasks.  Some of these documents are for new users, some are
  for advanced users.  Hopefully each document will also be of help for
  both new and advanced users.  If you have contributions to make,
  please send them to tech-sup@redhat.com.  If you have changes that
  need to be made to individual Tips, send them to the author of that
  document.



  2.  Introduction


  NFS stands for Network FileSystem, and is a way to share files between
  machines as if they were on your local hard drive.  Linux can be both
  an NFS server and an NFS client, which means that it can ``export''
  filesystems to other systems, and ``mount'' filesystems exported from
  other machines.


  3.  Mounting NFS Filesystems


  Use the mount command to mount a NFS filesystem from another machine:



       mount porky:/mnt/export /mnt/local




  In the above command, ``porky'' is the hostname of the NFS fileserver,
  ``/mnt/export'' is the filesystem that porky is exporting, and
  ``/mnt/local'' is a directory on my local machine where I want to
  mount the filesystem.  After the mount command runs (and if I had the
  proper permissions from porky) - voila! - I can `ls /mnt/local' and
  get a listing of the files in /mnt/export on porky.


  4.  Exporting NFS Filesystems


  The file that controls what filesystems you wish to export is
  ``/etc/exports''.  Its format is:



       directory       hostname(options)




  the ``(options)'' are optional.  For example:



       /mnt/export     speedy.redhat.com


  would allow speedy.redhat.com to mount /mnt/export, but:



       /mnt/export     speedy.redhat.com(ro)




  would only allow speedy to mount /mnt/export read-only.

  Each time you change /etc/exports, you need to tell the NFS daemons to
  examine it for new information.  One simple way to accomplish this is
  to just stop and start the daemons:



       /etc/rc.d/init.d/nfs stop
       /etc/rc.d/init.d/nfs start




  The following will also work:



       killall -HUP rpc.nfsd rpc.mountd




  The best way to see what is actually exported, is the showmount
  command (showmount(8)).  To see what filesystems are currently
  exported on your current machine, you would type showmount -e. To see
  what filesystems are exported on a remote machine (like fred.foo.com),
  you would do showmount -e fred.foo.com.


  5.  Further Reading


  See the following man pages for more details: nfsd(8), mountd(8), and
  exports(5).  Another good reference is ``Managing NFS and NIS
  Services'' published by O'Reilly and Associates.



  6.  Copyright Notice

  This document is Copyright (C) 1996 by Red Hat Software.
  Redistribution of this document is permitted as long as the content
  remains completely intact and unchanged.  In other words, you may
  reformat and reprint or redistribute only.