sabato 20 ottobre 2012

Linux Beginners Guide to NFS Mount Using Exportfs

Using NFS (Network File System), you can mount a disk partition of a remote machine as if it is a local disk. This article explains how to export a file system to a remote machine and mount it both temporarily and permanently.

1. Export File System to Remote Server using exportfs

To export a directory to a remote machine, do the following.
  • REMOTEIP – IP of the remote server to which you want to export.
  • : – delimiter
  • PATH – Path of directory that you want to export.

2. Mount Remote Server File System as a Local Storage

To mount the remote file system on the local server, do the following.
  • REMOTEIP – IP of the remote server which exported the file system
  • : – delimeter
  • PATH – Path of directory which you want to export.

3. Unmount Remote File System

Umount the remote file system mounted on the local server using the normal umount PATH. For more option refer to umount command examples.

4. Unexport the File System

You can check the exported file system as shown below.
# exportfs
To unexport the file system, use the -u option as shown below.
# exportfs -u REMOTEIP:PATH
After unexporting, check to make sure it is not available for NFS mount as shown below.
# exportfs

5. Make NFS Export Permanent Across System Reboot

Export can be made permanent by adding that entry into /etc/exports file.
# cat /etc/exports

6. Make the Mount Permanent Across Reboot

mount can be made permanent by adding that entry into /etc/fstab file.
# cat /etc/fstab    /mydata   ext3    defaults   0 0

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