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Full Discussion: awk to find lines containing word that occur multiple times
Top Forums Shell Programming and Scripting awk to find lines containing word that occur multiple times Post 302771349 by SkySmart on Wednesday 20th of February 2013 11:34:27 AM
Old 02-20-2013
awk to find lines containing word that occur multiple times
i have a script that scans a log file every 10 minutes. this script remembers the last line of the log and then uses it to continue monitoring the log when it runs again 10 minutes later.

the script searches the log for a string called MaxClients.

now, how can i make it so that when the script runs, it'll let me know when it finds not just 1 but 3 lines containing MaxClients?

Code:
awk 'FNR=>'5034' logfile | egrep MaxClients

sounds simple enough. but there's a catch. lets say the log file can contains:

Code:
Warning MaxClient is having issues - please
MaxClients java error...yams potato turkey
MaxClients error Fatal exception known known
MaxClients error Fatal exception known known
Could not complete. Error found. MaxClient initiated
MaxClients error Fatal exception known known
Could not complete. Error found. MaxClient initiated

in the above example, the script should only output the lines:

Code:
MaxClients error Fatal exception known known
MaxClients error Fatal exception known known
MaxClients error Fatal exception known known

This is because, this is the line that occurred at least 3 times when the script scanned the log at its 10 minute interval.
 

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LEARN ABOUT DEBIAN

ns_logctl

ns_log(3aolserver)					    AOLserver Built-In Commands 					ns_log(3aolserver)

__________________________________________________________________________________________________________________________________________________

NAME

       ns_log, ns_logctl - commands

SYNOPSIS

       ns_log severity message
_________________________________________________________________

DESCRIPTION

	While the AOLserver is running it logs various events from Notices to Fatal errors. Usually the AOLserver is running in the background, in
       which case these messages are placed in the server log. In absence of an ServerLog key in the AOLserver nsd.ini	file,  this  file  is  the
       /log/error.log  under  the AOLserver installation directory. When the AOLserver is running in the foreground the messages are redirected to
       stderr.

       ns_log writes the message to the server error log file. Allowable values for severity are:

       Notice - Something interesting occurred.

       Warning - Something that could mean something bad occurred.

       Error -	Something bad occurred.

       Fatal -	Something extremely bad occurred. The server will shut down after logging the message.

       Bug - Something occurred that implies that there is a bug in the code.

       Debug - If the server is in Debug mode, the message is printed. Debug mode is specified in the [ns/parameters] section of the configuration
       file. Otherwise, the message is not printed.

SEE ALSO

       nsd(1), info(n)

KEYWORDS

AOLserver								4.0							ns_log(3aolserver)
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