Hi All,

can anyone tell me what is wrong with this command.

tail -f /opt/olr-logs/PaymentGateway.log | grep "DEBUG - Start! AkhtarPaymentGateway - generateChecksum" | awk '{print $13}' | sed 's/,//g'>> abc


But I found nothing in the file abc

Please do help me.or Provide me some altenative way for this command.

Thanks and regards,
Akhtar Bhat.

Use each command one after another....
1st only the tail -f. If it works add the pipe with the grep. If it works, add the awk and so on.

Dear zaxxon,

Basically I need a shell script to monitor different IP's in the live logs.

The problem is I am new to shell scripting and dont know much about the scripting.

Look at the below line, the pattern will be always like this:

[2009-02-13 15:34:53,768] DEBUG - Start! PaymentGatewayFactory - getPaymentGateway (2, 100.00,Mohit Aggarwal,1942, 1,123.50.162.248, , 9821934958)

I want to extract the different IP's from this line every time when this kind of line adds to the logs.

Once the IP's are extracted and moved to another file, I want to compare them with previously existing IP's instantly and if the count of any particular IP will be more than predefined Value that IP should be Displayed on the Screen.
Hope you got, what is the problem ?
Please do help me in this matter.....

Thanks and regards,
Akhtar Bhat.

Use the below cmd for getting the ip(Assuming the format you have given)....

No need for 'grep' when piped into 'awk'.

Thanks for your valuable time,
But the solution shown below is not working properly although the same command is working when I replace the tail -f with the less command.

tail -f /opt/olr-logs/PaymentGateway.log | grep "DEBUG - Start!
PaymentGatewayFactory - getPaymentGateway" | awk -F "," '{print $7}'

Hi Akhtar ,

Try this command
grep "DEBUG - Start! PaymentGatewayFactory - getPaymentGateway" test.txt|cut -d"(" -f2|awk -F, '{print $6}'>>xyz.txt

The above command will write the ip address to the flat file .xyz.txt. But this will only work fine if you are sure that ip address will be the 6th field of this substring (2, 100.00,Mohit Aggarwal,1942, 1,123.50.162.248, , 9821934958).