how to use sed to get 2nd range?


 
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# 1  
Old 05-04-2011
Question how to use sed to get 2nd range?

Hi all,

Is there a way to use the sed command to get the second range?

For instance:

sample.dat:
-------------
Code:
11111
22222

33333

44444

-------------

using "sed -n '/^ping/,/^$/p' sample.dat can get the first 2 lines.
But is there a way to get the first 4 lines, from beginning to the line with "3"?

Thanks in adv.
Moderator's Comments:
Mod Comment
Please use code tags when posting data and code samples!

Last edited by vgersh99; 05-04-2011 at 12:42 PM.. Reason: please use code tags!
# 2  
Old 05-04-2011
Code:
sed -n '1,4p' infile

# 3  
Old 05-04-2011
Thanks for the answer.

But it is not the exact one i need, since in my case, the line number for first part, above the first blank line, maybe variable.

It would be great if there is a way to get the line from "1111" to the line above the second blank line, the line 5 in my sample.

Last edited by sleepy_11; 05-04-2011 at 01:01 PM..
# 4  
Old 05-04-2011
You don't need to match the blank lines
Code:
sed -n '/^11111$/,/^33333$/p' infile

If this is not what you want, post your real data and desired output.
# 5  
Old 05-04-2011
Code:
nawk 'BEGIN{FS=RS="";ORS=ORS ORS}FNR<=2' myFile

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