simple grep is not working for me


 
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# 1  
Old 04-02-2009
simple grep is not working for me

Hi, On the log Netscape log, I need to grep for 500 error. I am doing that but I also get 1500 in that same log.

cat access |grep "500"

Results:
"GET /css/RBR.css HTTP/1.1" 200 15000 304 - - - 399 639 523 164 0

This not what I need... Please advice.
# 2  
Old 04-02-2009
Quote it with a space, like so:
Code:
grep " 500 " access

Note: No need to cat into a grep.
# 3  
Old 04-02-2009
Quote:
Originally Posted by samnyc
Hi, On the log Netscape log, I need to grep for 500 error. I am doing that but I also get 1500 in that same log.

cat access |grep "500"

Results:
"GET /css/RBR.css HTTP/1.1" 200 15000 304 - - - 399 639 523 164 0

This not what I need... Please advice.
Try this
Code:
grep -w 500 access

# 4  
Old 04-02-2009
Quote:
Originally Posted by siquadri
Try this
Code:
grep -w 500 access

Just be careful with this approach. It includes non-word constituents, such as $500 or you might get a number like 159.500.3.24 or something like that.

Of course the down-side to the approach I stated (space sandwich) is if 500 is the first, last or only word of the line, so you need to consider if that's a possiblity. You can get around that like so:
Code:
grep -E " 500 |^500 | 500$|^500$" access


Last edited by marcus121; 04-02-2009 at 04:48 PM..
# 5  
Old 04-02-2009
Thank you so much to every one, I am able to get my results using grep -w
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