Building an NFS files system.
Notice: any thing printed in **BOLD** is ment to be typed.

Step1: identify  your systems

I will be using a three system set up one server and two clients

<code>
NFS Server: Mellow.student.lab IP address: 10.80.2.232
NFS Client: Purple.student.lab  IP address: 10.80.2.231
NFS Client: Frosty.student.lab  IP address: 10.80.2.230
</code>
 
Step2: Installing NFS

To install NFS on the server  run:

**apt-get install nfs-kernel-server nfs-common portmap
**

Then on the clients we installed NFS as follows:

**apt-get install nfs-common portmap**

 
Step 3: Exporting NFS files system.

server:

**mkdir /var/nfs
chown nobody:nogroup /var/nfs
**

Then edit  /etc/exports 


**vi /etc/exports**

# /etc/exports: the access control list for filesystems which may be exported \\
#               to NFS clients.  See exports(5). \\
# \\
# Example for NFSv2 and NFSv3: \\
# /srv/homes       hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subtree_check) \\
# \\
# Example for NFSv4: \\
# /srv/nfs4        gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check) \\
# /srv/nfs4/homes  gss/krb5i(rw,sync,no_subtree_check)\\
# \\

**/home    10.80.3.230(rw,sync,no_root_squash,no_subtree_check) 10.80.3.231(rw,sync,no_root_squash,no_subtree_check)** #setups nfs access for the two clients \\
/vicepa 10.80.3.14(rw,sync,no_root_squash,no_subtree_check) # setup to give access to a virual server 14  for the virual disk.


Whenever we modify /etc/exports, we must run

**exportfs -a**

afterwords to make the changes effective.

 
Step4: Mounting The NFS Shares On The Clients

First we create the directories where we want to mount the NFS shares:

**mkdir -p /xen
**
Then we can mount them as follows:

**mount 10.80.3.232:/home /xen**


You should now see the  NFS shares in the outputs of

client:~# df -h

Filesystem            Size  Used Avail Use% Mounted on
/dev/hda1              12G  772M   11G   7% /
tmpfs                 129M     0  129M   0% /lib/init/rw
udev                   10M  1.6M  8.5M  16% /dev
tmpfs                 129M     0  129M   0% /dev/shm
10.80.3.232:/home      37G  7.9G   27G  23% /xen        

:~# mount

/dev/hda1 on / type ext3 (rw,errors=remount-ro) \\
tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755) \\
proc on /proc type proc (rw,noexec,nosuid,nodev) \\
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) \\
procbususb on /proc/bus/usb type usbfs (rw) \\
udev on /dev type tmpfs (rw,mode=0755) \\
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) \\
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620) \\
10.80.3.232:/home on /xen type nfs (rw,addr=10.80.3.232) \\

 
Step 5: Mounting NFS Shares At Boot Time

Instead of mounting the NFS shares manually on the client, you could modify /etc/fstab so that the NFS shares get mounted automatically when the client boots.

Open /etc/fstab and append the following lines:

:~# vi /etc/fstab


# /etc/fstab: static file system information. \\
# \\
# \\
 <file system> <mount point>   <type>  <options>       <dump>  <pass>    \\
proc            /proc           proc    defaults        0       0        \\
/dev/hda1       /               ext3    errors=remount-ro 0       1      \\ 
/dev/hda5       none            swap    sw              0       0        \\
/dev/hdc        /media/cdrom0   udf,iso9660 user,noauto     0       0    \\
/dev/fd0        /media/floppy0  auto    rw,user,noauto  0       0        \\
**10.80.3.232:/home  /xen         nfs      rw,sync,hard,intr  0     0**  \\


To test if your modified /etc/fstab is working, reboot the client:

:~# **reboot**

After the reboot, you should find the  NFS shares in the outputs of

:~# **df -h**

Filesystem            Size  Used Avail Use% Mounted on \\
/dev/hda1              12G  772M   11G   7% /  \\ 
tmpfs                 129M     0  129M   0% /lib/init/rw  \\
udev                   10M  1.6M  8.5M  16% /dev \\
tmpfs                 129M     0  129M   0% /dev/shm  \\
10.80.3.232:/home      37G  7.9G   27G  23% /xen       \\ 

:~# **mount**

     
<file system> <mount point>   <type>  <options>       <dump>  <pass> \\
proc            /proc           proc    defaults        0       0  \\ 
/dev/hda1       /               ext3    errors=remount-ro 0       1  \\
/dev/hda5       none            swap    sw              0       0 \\ 
/dev/hdc        /media/cdrom0   udf,iso9660 user,noauto     0       0  \\
/dev/fd0        /media/floppy0  auto    rw,user,noauto  0       0  \\
10.80.3.232:/home  /xen         nfs      rw,sync,hard,intr  0     0 \\