Showing posts with label nfs. Show all posts
Showing posts with label nfs. Show all posts

Sunday, September 13, 2015

How to install NFS server on ubuntu 14.04

NFS ( Network file systems ) is used to share files with other computers over the network.
It is mainly used for centralized home folders. This article explains, how to setup NFS server on ubuntu 14.04 . also explains about mounting nfs shares on client machine .

Setup NFS server on ubuntu 14.04

Step 1 » Update the repositories.
sudo apt-get update

Step 2 » Install nfs server package by typing the command.
sudo apt-get install nfs-kernel-server

Step 3 » Make directory you want to share with other computers.
sudo mkdir /nhome

Step 4 » Here /etc/exports is the main config file for NFS.
Vim /etc/exports

#Share access to all networks
/nhome        *(rw,sync,no_root_squash)
#Share access to particular network
/nhome1       192.168.1.1/24(rw,sync,no_root_squash)
#Share access to particular host
/nhome2       host.example.com(rw,sync,no_root_squash)
/nhome3       192.168.1.153(rw,sync,no_root_squash)
#Share access to all hosts in particular domain
/nhome4       *linux.com(rw,sync,no_root_squash)


·         rw: This option gives the client computer both read and write access to the volume.
·         ro:  This option gives the client computer both read-only access to the volume.
·         sync: This option forces NFS to write changes to disk before replying. This results in a more stable and consistent environment, since the reply reflects the actual state of the remote volume.
·         nosubtreecheck: This option prevents subtree checking, which is a process where the host must check whether the file is actually still available in the exported tree for every request. This can cause many problems when a file is renamed while the client has it opened. In almost all cases, it is better to disable subtree checking.
·         norootsquash: By default, NFS translates requests from a root user remotely into a non-privileged user on the server. This was supposed to be a security feature by not allowing a root account on the client to use the filesystem of the host as root. This directive disables this for certain shares.

Step 5 » Start service by the below command.
sudo /etc/init.d/nfs-kernel-server start

Step 6 » Now check the NFS share status.
linux@ubuntu:~$ sudo exportfs -u
/nhome1 192.168.1.1/24
/nhome2 192.168.1.153
/nhome3 *.linux.com
/nhome world

Ubuntu – Client side

Step 1 » Install nfs client and dependencies .
sudo apt-get install nfs-common rpcbind

Step 2 » Create a directory /rhome .
sudo mkdir /rhome

Step 3 » Mount the remote share /nhome on local directory /rhome.
Temporary mount
sudo mount -t nfs 192.168.1.153:/nhome /rhome
add the following line in /etc/fstab file for permanent mount.
192.168.1.153:/nhome /rhome nfs rw,sync,hard,intr 0 0

Step 4 » Check the mounted share directory using mount command.
linux@ubuntu:~$ mount
rpc_pipefs on /run/rpc_pipefs type rpc_pipefs (rw)
192.168.1.153:/nhome on /rhome type nfs (rw,vers=4,addr=192.168.1.153,clientaddr=192.168.1.201)


Now local rhome is remote NFS directory . whatever data copied to that folder will be stored in remote directory /nhome.

Tuesday, September 8, 2015

How to mount NFS file systems on Rhel6 ?


mount -t nfs <IP Address>:/<Share Directory>    /mnt/

What all this means:

-t : Is used to tell the system that this is just an ordinary mount command. You use this when you do not have the drive information located in /etc/fstab
nfs : Tells the type of share you are trying to mount.
<IP Address>:/ : IP address of the drive you are trying to mount.
<share directory> : The Share within the Volume of the hard drive that you want to mount.
/mnt  : The location to which you want your share to be mounted.

Temporary Mount

example:

mount -t nfs 192.168.1.108:/data     /mnt/data

permanent Mount 

Open /etc/fstab

vim /etc/fstab
Ipaddress:/sharename   mount_point filesystem type defaults 0 0

example:

192.168.1.108:/data     /mnt      nfs  defaults 0 0

save and exit
wq:

mount -a


Troubleshooting NFS

showmount -e <IPaddress>
showmount  -e 192.168.1.108
The -e stands for "exports" or a list of shares exported by NFS.