Thanks a lot and a lot, danmero.
This times your code run perfectly and solved my trouble that make me confusing this few days ^^
I believe the reason that I keep on got different output result maybe due to the different version of awk and sed that I used at two different computer server.
hehe.
I do this careless and stupid mistakes 
And guilty to let you all busy to help me solve it .
I really appreciate all of your help ^^
Regarding to thread number 5,
Actually I just asking about how to extract only those content that matched with seq_8.
With "thread number 5" I assume you mean this thread: Extract specific content from file? But that is a different thread with a different question.. It's alright Patrick.. but it always helps if you can be as specific as possible...
S.
yup.
you're right.
I agree with what you said.
sorry ya.
If I create troubles for you
I will learn from this lesson in future 