{{parent page="LinuxFileSystem"}}

=== Setting up NFS server===
Edit the export file in /etc/exports
%%(text;exports)
/data 192.168.0.2(rw,no_root_squash,async)
%%

Enable and start NFS service
%%
chkconfig --level 35 portmap on
chkconfig --level 35 nfs on
service portmap start
service nfs start
%%

If portmap is not started, you will get an error similiar to the following:
%%
Cannot register service: RPC: Unable to receive; errno = Connection refused
rpc.rquotad: unable to register
%%

=== Mounting the NFS share on remote machine ===
Create the mount point directory, then mount the NFS share
%%
mkdir /nfs.data
mount 192.168.0.1:/data /nfs.data
%%

Make the mount permanent, edit /etc/fstab
%%
192.168.0.1:/data /nfs.data nfs _netdev,soft,intr,rw,bg,rsize=32768,wsize=32768,nfsvers=3 0 0
# _netdev makes sure this mount is brought up after networking
%%

===Ubuntu as NFS client===
Aside from the usual stuff, it seems that the following option is required otherwise NFS mount will be very slow and one will get repeated messages "lockd: cannot monitor x.x.x.x" in kernel buffer:

%%(text; /etc/default/nfs-common)
NEED_STATD=yes
%%

===NFSv4===
No idea why they make this so complicated and different form v3.

==Using CentOS as server==
%%(text;/etc/sysconfig/nfs)
SECURE_NFS="no"
%%

%%(text;/etc/exports)
/exports 192.168.18.0/24(rw,fsid=0,insecure,no_subtree_check,async)
/exports/home 192.168.18.0/24(rw,nohide,insecure,no_subtree_check,async)
%%

%%(text;/etc/idmapd.conf)
[General]

Verbosity = 0
Pipefs-Directory = /var/lib/nfs/rpc_pipefs
Domain = localdomain

[Mapping]

Nobody-User = nobody
Nobody-Group = nobody

[Translation]
Method = nsswitch
%%

Assuming you want to export /home, do this. This is because nfs4 works on psesdo filesystem?
%%
mkdir /exports
mount --bind /home /exports/home
/etc/init.d/nfs start
/etc/init.d/nfslock start
/etc/init.d/rpcidmapd start
%%


==using ubuntu as NFS client==
Notice that I'm mount /home on the remote server, not /exports/home!

%%(text;/etc/fstab)
192.168.18.12:/home /home nfs vers=4,hard,bg,tcp,intr,rsize=8192,wsize=8192 0 0
%%

%%(text;/etc/idmapd.conf)
[General]

Verbosity = 0
Pipefs-Directory = /var/lib/nfs/rpc_pipefs
Domain = localdomain

[Mapping]

Nobody-User = nobody
Nobody-Group = nogroup
%%

%%(text;/etc/defaults/nfs-common)
NEED_IDMAPD=yes
%%

mount remote share with vers=4 option