Setting UP nFS Server and Client..

I'm using two CentOS systems here:

• NFS Server: server.example.com, IP address: 192.168.0.100
• NFS Client: client.example.com, IP address: 192.168.0.101

• 2 Installing NFS

  Server side  :

  #yum install nfs-utils nfs-utils-lib

  #chkconfig --levels 235 nfs on
  #/etc/init.d/nfs start 

  Client Side:

  # yum install nfs-utils nfs-utils-lib

  Creating NFS Share : I'd like to make the directories /home and /var/nfs accessible to the client; therefore we must "export" them on the server.
  When a client accesses an NFS share, this normally happens as the user nobody. Usually the /home directory isn't owned by nobody (and I don't recommend to change its ownership to nobody!), and because we want to read and write on /home, we tell NFS that accesses should be made as root (if our /home share was read-only, this wouldn't be necessary). The /var/nfs directory doesn't exist, so we can create it and change its ownership; in my tests the user and group nobody both had the ID 99 on both my CentOS test systems (server and client); when I tried to write to /var/nfs from the NFS client, I got a Permission denied error, so I did a chmod 777 /var/nfs so that everyone could write to that directory; writing to /var/nfs from the client worked then, and on the client the files written to /var/nfs appeared to be owned by the user and group nobody, but on the server they were owned by the (nonexistant) user and group with the ID 65534; so I changed ownership of /var/nfs to the user/group 65534 on the server and changed permissions of /var/nfs back to 755, and voilà, the client was allowed to write to /var/nfs:
  
  
  #mkdir /var/nfs
  #chown 65534:65534 /var/nfs
  #chmod 755 /var/nfs
  
  
  #vi /etc/exports
  Entry should made as bellow :

  /home           192.168.0.101(rw,sync,no_root_squash,no_subtree_check)
  /var/nfs        192.168.0.101(rw,sync,no_subtree_check)

  Whenever we modify /etc/exports, we must run
  
  #exportfs -a
  
  

  Mounting The NFS Shares On The Client

   

  First we create the directories where we want to mount the NFS shares, e.g.:
  
  #mkdir -p /mnt/nfs/home
  #mkdir -p /mnt/nfs/var/nfs
  Afterwards, we can mount them as follows:
  
  #mount 192.168.0.100:/home /mnt/nfs/home
  #mount 192.168.0.100:/var/nfs /mnt/nfs/var/nfs
  You should now see the two NFS shares in the outputs of
  
  #df -h
  [root@client ~]# df -h
  Filesystem            Size  Used Avail Use% Mounted on
  /dev/mapper/VolGroup00-LogVol00
                         28G  2.2G   25G   8% /
  /dev/sda1              99M   13M   82M  14% /boot
  tmpfs                 250M     0  250M   0% /dev/shm
  192.168.0.100:/home    28G  2.6G   25G  10% /mnt/nfs/home
  192.168.0.100:/var/nfs
                         28G  2.6G   25G  10% /mnt/nfs/var/nfs
  [root@client ~]#

  Mounting NFS Shares At Boot Time

  
  
  Open /etc/fstab and append the following lines:
  
  #vi /etc/fstab
  
  
  make changes as bellow :

  [...]
  192.168.0.100:/home  /mnt/nfs/home   nfs      rw,sync,hard,intr  0     0
  192.168.0.100:/var/nfs  /mnt/nfs/var/nfs   nfs      rw

  save and exit!

  restart the nfs service 

  #service nfs restart