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Grepping log file

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# 8  
Old 10-20-2009
man cron and crontab
# 9  
Old 10-20-2009
Np; if you only want the IP:

sed -ne "s/.*HOST=\([^)]*\)).*/\1/p" infile

# 10  
Old 10-20-2009
How can i apply crono or cronotab to my data? I think periods of 1 hour are the best to analze, dont you agree?

I should count the number of ips per the count i have already made :

#!/usr/bin/perl -w
use strict;
my %counts = ();

my $file = "access.log";
open (FH, "< $file") or die "Can't open $file for read: $!";
my @lines;
while (<FH>) {
    push (@lines, $_);
for (@lines) {
 foreach my $keys (keys %counts) {
 print "$keys = $counts{$keys}\n";

close FH or die "Cannot close $file: $!";

---------- Post updated at 04:50 AM ---------- Previous update was at 04:23 AM ----------

Cron and cronotab schedule a job to be done according to the local time. But my case is different, so, based on the data i have - log file - how can i collect the date/time and split them into chunks of 1 hour....of course each time is associated to a ip address. Any ideias?
# 11  
Old 10-20-2009
So you want to count how often each IP shows up per hour?
# 12  
Old 10-20-2009
Yes, that is exactly what i want. In the specific hour a chunk of information, the time, date and its mapping to the ip address. Should the files be split into seperate files having for example the title (month, day, hour), i am not sure of the best solution.

---------- Post updated at 06:58 AM ---------- Previous update was at 06:17 AM ----------

Maybe a Array of Hashes could be the best solution ?
# 13  
Old 10-21-2009
Here a point to start at with awk without splitting it up on hours, just taking the whole input file:
$> cat infile
16-OCT-2009 09:11:47
16-OCT-2009 09:11:47
16-OCT-2009 10:11:47
16-OCT-2009 10:11:47
16-OCT-2009 10:11:47
16-OCT-2009 11:11:47
16-OCT-2009 11:11:47
16-OCT-2009 11:11:47
$> awk 'NR==FNR{a[$3]+=1; next} END{for(x in a){print x,"->",a[x]}}' infile -> 4 -> 4

# 14  
Old 10-21-2009
Thanks for the feedback, this is a brilliant way of treating the data, how could i seperate this log into smaller chunks, lets say seperate files based on hours or days, and f.e. release an alert if the number of counts achieves a certain limit, throwing a message f.e. >= 100 -> "red alert"

---------- Post updated at 05:18 AM ---------- Previous update was at 04:58 AM ----------

I was thinking as having the final output of the file as:

The output of all the times-> corresponding ip of that chunk, for example (between 1 and 2 am) and in the final this counting report.

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