shared location using NFS in Linux

do u have 2 linux boxes, but want to have 1 shared location to which 2 boxes can access...

Let us say we have machine 1 & machine 2

1)      Go to machine 1

2)      vi /etc/exports

3)       add this line /vol1/shared  *(rw)  # the shared dir contents will be shared now

4)      /etc/init.d/nfs restart (if you edit the file /etc/exports you need to restart nfs service)

Go to machine 2

1)      Mkdir /vol1/shared

2)      Use mount command

$mount machine1:/vol1/shared  /vol1/shared-t nfs -o proto=tcp,vers=3 # in machine1 we exported shared dir

3)      You are done here . if you want to make mount permanent then you should edit /etc/fstab .

Note: make sure the user has same uid and gid in these two machines if you want to have write permissions from 2 boxes to this shared directory .  we should use usermod/groupmod commands to change uid/gid of user in machine 2.

Give $ id user #command in 2 boxes and make sure uid/gid are same , if not use the following commands

Examples

1)Usermod –u user

                2) Groupmod –g user

                3) Usermod –g user (this changes perfuser to belong to group specified by new_gid tat we created in 2^nd command