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# 1  
Old 09-24-2011
GREP
DAta in the file :

Code:
10.5.67.2
19.23.45.6
12.222.34.4
23.24
12.34.45.4
24.45.56.7
16989.2657268.2687.2789
1234.45.56.67
1134.45

I want to display only 23.24 in the output.

I tried this :

Code:
nv8510@:/home/nv8510>grep -E '^[0-9]+\.[0-9]{2}$' IPADD
23.24
1134.45

But its also displaying the 1134.45 , i do not want this.
Please help.
Thanks in Advance,
Neeraj


Moderator's Comments:
Mod Comment Video tutorial on how to use code tags in The UNIX and Linux Forums.
Last edited by radoulov; 09-24-2011 at 04:31 AM..
# 2  
Old 09-24-2011
whats the criteria for 23.24? will it always be 2digit.2digit?

--ahamed
# 3  
Old 09-24-2011
Yes Aahemd , thats the prb Smilie

---------- Post updated at 11:40 PM ---------- Previous update was at 11:39 PM ----------

It Will always be 2didit.2digit
# 4  
Old 09-24-2011
Code:
grep -o ^[0-9][0-9]\.[0-9][0-9]$ input_file

--ahamed
# 5  
Old 09-24-2011
Code:
nv8510@:/home/nv8510>grep -o ^[0-9][0-9]\.[0-9][0-9]$ input_file
grep: illegal option -- o
usage: grep [-E|-F] [-c|-l|-q] [-bhinsvwx] -e pattern_list...
        [-f pattern_file...] [file...]
usage: grep [-E|-F] [-c|-l|-q] [-bhinsvwx] [-e pattern_list...]
        -f pattern_file... [file...]
usage: grep [-E|-F] [-c|-l|-q] [-bhinsvwx] pattern [file...]


I am using KSH shell , may be it does not support -o option , please help Smilie

---------- Post updated at 11:59 PM ---------- Previous update was at 11:57 PM ----------

It worked with -e option thanks a lot Ahamed Smilie

---------- Post updated 09-24-11 at 12:03 AM ---------- Previous update was 09-23-11 at 11:59 PM ----------

Just one Question Ahamed :

grep -E '^[0-9][0-9]+\.[0-9][0-9]$' IPADD this is not working fine but this is grep -E '^[0-9][0-9]\.[0-9][0-9]$' IPADD why ? why it is not working with concatenation , i am lil bit confused.
Last edited by radoulov; 09-24-2011 at 04:32 AM.. Reason: Use code tags!
# 6  
Old 09-24-2011
[0-9][0-9]+\.
+ means one or many
so it will look for as many numbers till it finds . in your case


you can use the same regex with sed also if you have trouble with grep
Code:
sed -n 's/^[0-9][0-9]\.[0-9][0-9]$/&/p' input_file

--ahamed
# 7  
Old 09-24-2011
got it now , i thought + was for concatenation , but i was wrong it is used for many occurences.
thanks a lot ahamed
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