# exportfs -o rw,all_squash,sync,anonuid=500,anongid=500 172.16.0.0/24:/www
# exportfs 
/www          	172.16.0.0/24

# cat /var/lib/nfs/etab
/www	172.16.0.0/24(rw,sync,wdelay,hide,nocrossmnt,secure,root_squash,all_squash,no_subtree_check,secure_locks,acl,anonuid=500,anongid=500)
		

reload /etc/exports

/usr/sbin/exportfs -r
		

To unexport the /usr/tmp directory:

# exportfs -u netkiller.github.com:/usr/tmp
		

To unexport all exports listed in /etc/exports:

# exportfs -au
		

#!/bin/bash
RETVAL=0

start()
{
	/usr/sbin/exportfs -o rw,all_squash,sync,anonuid=500,anongid=500 172.16.0.0/24:/backup
	mount /dev/sdb1 /backup
	RETVAL=$?
	echo
}

stop()
{
	exportfs -u 172.16.0.0/24:/backup
	umount /backup
	RETVAL=$?
}