Linux Tips

  


Exporting a File System for NFS - (/etc/exports)

by Jeff Hunter, Sr. Database Administrator

Contents

Introduction

This article presents the methods for preparing a set of directories that can be exported to NFS clients using Linux. Under Linux this is can be accomplished by editing the /etc/exports file.

For the purpose of this example, I will be exporting (sharing) the directory /mnt/software.

About the /etc/exports File

The /etc/exports file contains an entry for each directory that can be exported to NFS clients. This file is read automatically by the exportfs command. If you change this file, you must run the exportfs command before the changes can affect the way the daemon operates.

Only when this file is present during system startup does the rc.nfs script execute the exportfs command and start the nfsd and mountd daemons.

Edit the exports file vi /etc/exports and add:


/dir/to/export host1.mydomain.com(ro,root_squash) /dir/to/export host2.mydomain.com(ro,root_squash)

Where:

For this change to take effect you will need to run the following command on your terminal:


[root@racnode1 ~]# /usr/sbin/exportfs -a

Examples

How to export the the directory in read/write mode (not a good idea!):


/u01/app/oracle *(rw,no_root_squash)

About the Author

Jeffrey Hunter is an Oracle Certified Professional, Java Development Certified Professional, Author, and an Oracle ACE. Jeff currently works as a Senior Database Administrator for The DBA Zone, Inc. located in Pittsburgh, Pennsylvania. His work includes advanced performance tuning, Java and PL/SQL programming, developing high availability solutions, capacity planning, database security, and physical / logical database design in a UNIX / Linux server environment. Jeff's other interests include mathematical encryption theory, tutoring advanced mathematics, programming language processors (compilers and interpreters) in Java and C, LDAP, writing web-based database administration tools, and of course Linux. He has been a Sr. Database Administrator and Software Engineer for over 20 years and maintains his own website site at: http://www.iDevelopment.info. Jeff graduated from Stanislaus State University in Turlock, California, with a Bachelor's degree in Computer Science and Mathematics.



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Last modified on
Friday, 29-Apr-2011 02:25:58 EDT
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