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Grep Question..

 
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Top Forums UNIX for Dummies Questions & Answers Grep Question..
# 8  
Old 06-10-2010
I got it!
Here is the working solution...

tail -f /var/log/ncolog | egrep -vi "autovac|closed|sucess|FTP LOGIN FROM|DNS_OK|cron"

Works perfectly..!

I now want to add a spin, so this basically keeps tailing the log "filtering the above" I want to add a statement to send me and alert via mail if the tail sees a specific message I have this so far.

Code:
/var/log/ncolog | egrep -vi "autovac|closed|sucess|FTP LOGIN FROM|DNS_OK|cron" > /tmp/checkdmesg.$$

HERE I am stuck .. as I want this to be in a loop "live" constantly checking the file .. or the tail..

then
   mailx -s "error type"  address < /tmp/checkdmesg.$$
fi
exit

Any advice, sorry pretty new but enjoying this quite a bit.

I was thinking of

creating a loop with a break which keeps re-scanning every 30 seconds "sleep 30" ..

and running the script over and over ?!

help with the script appreciated
 
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LEARN ABOUT DEBIAN

logtop

LOGTOP(1)						      General Commands Manual							 LOGTOP(1)

NAME

       logtop - Realtime log line rate analyser

SYNOPSIS

       logtop [OPTIONS]

DESCRIPTION

	logtop is a System Administrator tool analyzing line rate on stdin.
	It reads on stdin and print a constantly updated result
	displaying, in columns:
	Line number, count, frequency, and the actual line.

	 $ tail -f FILE | logtop
	is the friendly version of:
	 $ watch 'tail FILE | sort | uniq -c | sort -gr'

OPTIONS

       -s, --size=K
	      Only keep K lines in memory, instead of 10000.

       -q, --quiet
	      Do not display a live view of the data, only display a top at exit.

       -l, --line-by-line=K
	      Print result line by line, in a machine friendly format, K is the number of result to print per line.

		Line by line format is : [%d %f %s	]*

		  %d : Number of occurences
		  %f : Frequency of apparition
		  %s : String (Control chars replaced by dots.

       -i, --interval=K
	      Interval between graphical updates, in seconds. Defaults to 1.

       -h, --help
	      Show summary of options.

       -v, --version
	      Show version of program.

EXAMPLES

       Here are some logtop usage examples.

       tail -f cache.log | grep -o "HIT|MISS" | logtop

       Realtime hit / miss ratio on some caching software log file.

       tail -f access.log | cut -d' ' -f1 | logtop -s 10000

       Realtime most querying IPs on your server, as long as log lines in access.log starts with the client IP.

       tail -f access.log | cut -d' ' -f7 | logtop -s 10000

       Realtime most requested web pages in a NCSA like log file.

       cat auth.log | grep -v "CRON" | grep -o ": .*" | logtop -q -s 100000

       Display a one-shot simple analyse of your auth.log.

SEE ALSO

       watch(1)

AUTHOR

       logtop was written by Julien Palard.

       This manual page was written by Julien Palard <julien@palard.fr>, for the Debian project (and may be used by others).

								  April 16, 2011							 LOGTOP(1)