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# Updating NFS Share permissions..
- URL: https://kudithipudi.org/updating-nfs-share-permissions/
- Published: 2006-03-06T15:55:29.000Z
- Updated: 2006-03-06T15:55:29.000Z
- Description: Wanted to add this for my future reference. To update the permissions on a NFS (Network File System) share, you need to edit the “/etc/exports” file...
- Author: admin
- Tags: Linux, Technology, Uncategorized, #wp, #wp-post, #Import 2026-08-23 02:32

Wanted to add this for my future reference. To update the permissions on a NFS ([Network File System](http://en.wikipedia.org/wiki/Network%5FFile%5FSystem?ref=kudithipudi.org)) share, you need to edit the “**/etc/exports**” file and then run “**/usr/sbin/exportfs -a**” to update the share permissions.

Syntax of /etc/exports looks like  
**/dir/to/export host1.mydomain.com(ro,root\_squash)**

UPDATE : Looks like the NFS daemon caches DNS lookups when authenticating a client. Am not sure if this is only in older versions. After we updated the exports file, the server still kep erroring out with a “unresolvable reverse lookup” error. I finally had to restart the daemon to make it check on the DNS records for the accessing client.