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Saturday, August 14, 2010
NFS (Network File system) Setup in Linux
Friends, Here is the Quick HOWTO again.. Hope this post is useful for quick reference
Points to Note:
1. NFS is transparent access to remote file systems
2. It is Installed by default
3. Uses RPC for communications
1. Export a directory on the server using: /etc/exports
Entry something like this,
a. /path_to_directory IP_ADDR(rw)
example : /nfs1 192.168.75.110(rw) ]
c. mkdir /nfs1
d. start NFS server - 'service nfs start'
e. Confirm export(s) - 'exportfs -v'
Note: NFS matches remote user's UID to local /etc/passwd to determine ACLs
Now login to remote machine and do following.
3. Mount exports on a remote system
a. mount -t nfs REMOTE MACHINE IP:SHARE_NAME LOCAL_MOUNT_POINT
[ Example: mount -t nfs 192.168.75.199:/nfs2 /nfs2 ]
4. Allow local 'root' user the ability to write to /nfs1 export
a. /etc/exports: (rw,no_root_squash)
5. Setup mount points so that they're available upon reboot in /etc/fstab
Unmount and confirm that NFS mount points will be available when the client system changes runlevels (reboots, starts, etc.) - 'mount -a'
showmount -a 192.168.75.199 - shows mounts on this system (connected NFS clients)
6. Attempt to mount /nfs1 from an unauthorized system
Fails because client's IP does not match server's /etc/exports
Update server's /etc/exports to allow additional hosts/subnet/etc.