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UNIX - requirement

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# 8  
Old 06-17-2013
ok .What kind of expression we have ? Do you have any link for these kind of pure awk programming .
# 9  
Old 06-17-2013
The kind where zero or a blank string is false, and anything else is true.

You could have (NR != 5), to avoid printing the 5th line (since NR means number of records).

You could have $1, to avoid printing blank lines, since $1 means the first column, and if it's blank you don't want to print it.

And so forth.
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