Redhat:NFS exports

exports file

The /etc/exports file is used to configure the directories for NFS. When the exportfs -a command is run it exports the directories listed so they can be mounted on NFS clients.

Each line exports a single directory, according the the networks and options listed.

/depot/shared 172.16.0.0/255.255.0.0(rw,async,fsid=0)
/depot/shared 172.28.0.0/255.255.0.0(rw,async,no_root_squash)
/home 172.16.0.0/255.255.0.0(rw,async,no_root_squash)
/home 172.28.0.0/255.255.0.0(rw,async,no_root_squash)

In the example the /depot/shared direcotry is exported to the 172.16 and 172.28 networks with teh options listed.

Export Options

insecure	communication above port 1024 fopr NFS 2 and 3
insecure_locks	Does not check user permissions - used for NFS 2 and 3
no_subtree_check	Disables permissions checks for super directories
sync	Syncs write operations - on by default
no_wdelay	Immediate writes
hide	Hide files systems
mp	export only if mounted
fsid	set the file system id
no_root_squash	Treat remote root user as local root.
all_squash	Treat all clients as anonymous
anonuid=<userid>	Local user id for anonymous users

Activate the exports

exportfs -a # export directories
exportfs -r # reexport directories
exportfs -ua  unexport and export directories