Thanks for the reply...First time I am doing installtion on linux,with Unix we need to rebuild the kernal.But fot linux in the documents it is says "Write a script to initialize these values during system startup, and include the script in your system init files." Then i had a doubt once it has set and and restart should we include it it linux init file,it should automatically come into effect ..That is why I just asked....

Thanks a lot.

Manoj