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Grep Tricks

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Grep Tricks #1
How to select multiple lines with grep before and after the matched pattern .

grep -B1 -A2 "DMA" message.txt

B[n]          n lines before matched pattern
A[n]          n lines after matched pattern

Grep Tricks #2
How to display(print) the line numbers of the matched pattern with grep.

grep -n "DMA" message.txt

n              prints line no
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Anonymous said…
this was helpful. thanks
June 30, 2010 at 5:11 AM
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