Please exaplain the term file locking in case of NFS.

Which mount is useful in case of NFS? Hard mount or soft mount?
I am not able to use linux in init 5 mode.

I have recently upgraded the linux os from RHEL 4 ES to RHEL5 ES. I was able to get the init 5 mode in RHEL 4. Please let me know any solution in this case. waiting for your reply.
