mkdir tip
Ok, maybe I feel stupid for not knowing this but check this out.
When you want to create multiple directories on Linux, like, say, the following:
Master:
–sub1
–sub2
–sub3
you can just do all with one command:
mkdir sub1 sub2 sub3
intead of multiple commands:
mkdir sub1
mkdir sub2
etc…
Cool 
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Thanks everyone for the great insight and post here.Its great when everyone can share ideas and expirence with others and when it makes a differnce as well.i will be making a contribution here as well.thanks