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mulitple grep using tail

 
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# 1  
Old 09-02-2010
mulitple grep using tail
I have a basic tail/grep question. I have logs that are generated & kept in a directory called alert_audit. I am using "tail" to see the logs that are coming in, but I only need logs that contain the IP address 10.249.185. or 10.247.231.

Here is the command I have, but it pulls all IP addresses. What am I doing wrong . Thanks in advance for the help.

tail -f alert_audit.txt grep 10.249.185. | 10.247.231.
# 2  
Old 09-02-2010
Hello ,

use "egrep" instead of "grep" . You are using ERE (extended regular expressions) which egrep supports .

Regards,
Gaurav.
# 3  
Old 09-02-2010
Great. thanks for the help.
# 4  
Old 09-02-2010
Quote:
Originally Posted by robertson1995
tail -f alert_audit.txt grep 10.249.185. | 10.247.231.
You need egrep to use | in expressions as gaurav said. Also, your scripting needs work, you forgot a | before grep, and you have to quote the expression to use | in it. You should also be escaping the .'s because . is a special character in regular expressions.

Code:
tail -f alert_audit.txt | egrep "10\.249\.185\.|10\.247\.231\."

 
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