NFS
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• State the functions of an NFS server and an NFS client.

Distributing files to clients across a n/w.

NFS server - stores files on a local disk, and runs daemons to share them across the n/w

NFS client  - mounts shared files from an NFS server. Transparent,NFS share appear to be local

• List the steps required to make resources available and unavailable for mounting as a shared resource.

1. Add an entry ----- > share /usr/share/man

2. Start NFS daemons ---> /etc/init.d/nfs.server start

3. On the NFS client ---> mount <servername>:/usr/share//man /usr/share/man

4. To unmount ---> umount /usr/share/man

5. To stop sharing ---> unshareall / remove share entry fromm DFS tab and stop/start the NFS server.

• Identify the command used in the /etc/dfs/dfstab file on an NFS server to enable automatic sharing of resources.

share [ -F fs-type ] [ -o options ] [ -d description ] path_name

share -F nfs /export/home

Data about share is logged in /etc/dfs/sharetab file

ex;

share -F nfs -o ro /export/raj

share -F nfs -o rw:raj:iplanet /export/raj

• Explain how entries in the /etc/vfstab file can enable automatic mounting of resources on an NFS client.

/etc/vfstab is read by sys startup scripts and is in charge of mounting specified fs at boot time.

• State the function of each of these commands: mountall, umountall, shareall, and unshareall

mountall - when executed on a client m/c will mount all the shares specified in /etc/vfstab

mountall -r - only mounts remote shares

unmountall -r  - only unmounts remote shares

shareall - share all fs listed in /etc/dfs/dfstab

unshareall - unshare all currently shared fs -- /etc/dfs/sharetab.