find out line number of matching string using grep


 
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# 1  
Old 09-09-2009
Error find out line number of matching string using grep

Hi all,

I want to display line number for matching string in a file. can anyone please help me.

I used

grep -n "ABC" file

so it displays
6 ABC.

But i only want to have line number,i don't want that it should prefix matching context with line number.

Actually my original problem is that i want to use this number & used to print next line.

So can anyone please provide me code to first find out a particular pattern in file & displays the content of next line.

i used to print the content using sed -n '8p' file, if i have found the matching string on line 7.

Thanks in advance
sarbjit

Last edited by sarbjit; 09-09-2009 at 04:41 AM..
# 2  
Old 09-09-2009
Code:
grep -n "ABC" file | awk '{print $1}'

# 3  
Old 09-09-2009
Code:
awk '/ABC/{print NR}' file

Regards
# 4  
Old 09-09-2009
Quote:
Originally Posted by Scrutinizer
Code:
grep -n "ABC" file | awk '{print $1}'

Thanks 4 reply
but it is still showing me the part of pattern.
eg i need to search "abc -x"
it displays now 7abc:

Thanks
# 5  
Old 09-09-2009
Try:

Code:
awk '/pattern/{print FNR}' infile

or:

Code:
sed -n '/pattern/=' infile

# 6  
Old 09-09-2009
Quote:
Originally Posted by Franklin52
Code:
awk '/ABC/{print NR}' file

Regards
thanks man, it really works, but can you please provide me code to display the contents of next line, actually i was thinking that i could store this number in variable & then use
sed -n "vp" file
where v is the output from the code + 1 you provided, but it is not working . any alternative please
# 7  
Old 09-09-2009
use "$v" instead of "v" in sed.


in awk something like this :

Code:
awk '/pattern/ {p=1;next} p--' file_name.txt

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