Monitoring a Log File

[dude70_1]

Hi Guys,

I need to monitor at the end of a logfile using a korn script continuously for a particular phrase to occur. Like "Error Occured" then I have to read the whole line and write to another file. Can you guys provide me any help!

Thanks in advance!
Dude70

[Paula J Frazer-Campbell]

Hi

Try

tail logfile | grep "error occured" > otherfile

As a start point

Paula

[Paula J Frazer-Campbell]

A little more

Create a file called monitorlog containing:-


--------------cut-----------------
#!/bin/sh
tail logfile | grep error occured > otherfile
sleep 10
exec monirorlog
----------------cut--------------

this will check the file and write out the error to otherfile, sleep for 10 seconds and then restart itself.

Paula

HTH

Paula

[Steven E. Protter]

Modify the attached script, point it to the log you want to monitor, change lbolt to error or whatever and don't forget to change the email address.

I will have to embarass you if I get an email from your system... :-)

SEP

[dude70_1]

Thanks Paula,

Thing is the log file is dumped with lots of errors some times. I don't want to read the same error again. I want to start from the point where I finished reading before.

Thanks.

[Michael Schulte zur Sur]

Hi,

look here:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=293706

greetings,

Michael

[Paula J Frazer-Campbell]

Neat script Steven,

I was just giving pointers, you gave the solution.

;^)


Paula

[Paula J Frazer-Campbell · Accepted solution]

Hi

Can you post an example of the log file?

Paula

[Michael Schulte zur Sur]

Hi Dude70,

this is the script from the thread from Bryan:
tail -f log.txt | while read LINE
do
echo $LINE | grep "Error Occured" >> log2.txt
done

greetings,

Michael

[John Carr_2]

how about this

tail -f logfile | grep my_error

tail will keep waiting on the logfile and feed new lines to grep as they occur continuing until you kill the process.

John.