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grep a string in a file

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# 15  
Old 04-16-2012
Many thanks.It was my understanding mistake.

now say the search string is like "c[o]mp"

So i tried s=c/[o/]mp but it's not working.Can you please help me.

---------- Post updated at 02:03 AM ---------- Previous update was at 01:58 AM ----------

Also i run the belwo command which gives me the below o/p.

Code:
 cat data.log
ram
dept
c[o]mp
shyam
field
comp

Code:
 awk '{ A[NR%(n+1)]=$0 }; $0~s {i=(NR-n)%(n+1); if (i in A) print A[i] }' s=c[o]mp n=2 data.log>
shyam

it is giving me only "shyam" string

Moderator's Comments:
Mod Comment Please use code tags. Video tutorial on how to use them
Last edited by Scrutinizer; 04-16-2012 at 04:40 AM.. Reason: code tags
# 16  
Old 04-16-2012
Try:
Code:
awk '{ A[NR%(n+1)]=$0 }; $0~s {i=(NR-n)%(n+1); if (i in A) print A[i] }' s='c\\[o\\]mp' n=2 infile

or
Code:
awk '{ A[NR%(n+1)]=$0 }; $0~s {i=(NR-n)%(n+1); if (i in A) print A[i] }' s='c.o.mp' n=2 infile

for that matter.

s should contain a regular expression
This User Gave Thanks to Scrutinizer For This Post:
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