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Grep with 8 lines before and after pattern.

 
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# 1  
Old 08-07-2009
Grep with 8 lines before and after pattern.
OK. I have a file I'd like to be able to grep, but on top of returning the line where the pattern matches, I'd like to be able to get the previous 8 lines and the following 8 lines. Is there a way to do this?
# 2  
Old 08-07-2009
you can use grep -n option to grep the line number .

Then using that line number as variable you can use head and tail to get the +/- 8 lines
# 3  
Old 08-07-2009
Hi.

Some versions of grep have a -A and -B option:

From the (RedHat) Grep man page:

Quote:
-A NUM, --after-context=NUM
Print NUM lines of trailing context after matching lines.

-B NUM, --before-context=NUM
Print NUM lines of leading context before matching lines.
 
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