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wow~ that works!
It will be great if you could also explain the code to me, since I'm a beginner in this.

Thanks so much!

And I want to delete the characters longer than 20 for each line start with #. The other lines should remain the same. I think this can be done by sed. Could anyone help me with this? Thanks!

my...

That woks! By the way, I don't have nawk on my mac and also linux red hat, so I use awk instead.

A further question, I have a list of names in one file, how do I get each of those and put together...

Thanks for all your replies!!

I ran the one line awk script and turn out to be symbol">" is missing in the output file. How can I can the ">" remained in the very beginning like...

Hey,
I have a problem about how to get one section of a file?
I'm new to shell, but by reading some tutorial, I think I can use awk to do this.

my input file:
>ref|ZP_04937576.1|...