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Full Discussion: How to find ip addresses in logfiles?
Top Forums Shell Programming and Scripting How to find ip addresses in logfiles? Post 302506312 by type8code0 on Sunday 20th of March 2011 01:07:47 AM
Old 03-20-2011
Quote:
Originally Posted by LivinFree
My first guess would be:
Code:
#! /bin/bash

logfile=/path/to/logfile
while read ip; do
    zgrep "$ip" $logfile > output_logfile_${ip}
done <iplist

It could be done more elegantly, and maybe more efficiently, if you post more details/requirements. This should work for a quick'n'dirty script, though.
Thanks LivinFree for the bash script. I’m new in a bash script, but I’ll try to learn this.
There are a few log files I need to check. All of them located in /logs folder and there are (from March 16 till today):

Code:
# pwd
  /logs

Code:
-rw-r--r-- 1 root other 1854093343 Mar 20 02:00 logfile.hour02
-rw-r--r-- 1 root other 366729263 Mar 20 01:00 logfile.hour01
-rw-r--r-- 1 root other 9001399293 Mar 20  00:47 logfile.20.Z
-rw-r--r-- 1 root other 8267721901 Mar 19  00:45 logfile.19.Z
-rw-r--r-- 1 root other 7498682761 Mar 18  00:39 logfile.18.Z
-rw-r--r-- 1 root other 6196926607 Mar 17  00:31 logfile.17.Z
-rw-r--r-- 1 root other 4794493570 Mar 16  00:23 logfile.16.Z

Code:
# cat iplist
10.10.10.10
10.10.10.11
10.10.10.12
10.10.10.13
10.10.10.14

I would like to send output of this file into my home directory which is in ~/result

Thanks again for your help

---------- Post updated at 01:07 PM ---------- Previous update was at 12:57 PM ----------

I've modified the bash script based on log files location. Do you think this will work? Thanks

Code:
#! /bin/bash

logfile=/logs/logfile.20.Z
logfile=/logs/logfile.19.Z
logfile=/logs/logfile.18.Z
logfile=/logs/logfile.17.Z
logfile=/logs/logfile.16.Z

while read ip; do
    zgrep "$ip" $logfile > ~/acs/output_logfile_${ip}
done <iplist

 

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LEARN ABOUT LINUX

bootlogd

BOOTLOGD(8)						Linux System Administrator's Manual					       BOOTLOGD(8)

NAME

       bootlogd - record boot messages

SYNOPSIS

       /sbin/bootlogd [-c] [-d] [-r] [-s] [-v] [ -l logfile ] [ -p pidfile ]

DESCRIPTION

       Bootlogd  runs in the background and copies all strings sent to the /dev/console device to a logfile. If the logfile is not accessible, the
       messages will be kept in memory until it is.

OPTIONS

       -d     Do not fork and run in the background.

       -c     Attempt to write to the logfile even if it does not yet exist.  Without this option, bootlogd will wait for the  logfile	to  appear
	      before attempting to write to it.  This behavior prevents bootlogd from creating logfiles under mount points.

       -r     If there is an existing logfile called logfile rename it to logfile~ unless logfile~ already exists.

       -s     Ensure  that the data is written to the file after each line by calling fdatasync(3).  This will slow down a fsck(8) process running
	      in parallel.

       -v     Show version.

       -l logfile
	      Log to this logfile. The default is /var/log/boot.

       -p pidfile
	      Put process-id in this file. The default is no pidfile.

BUGS

       Bootlogd works by redirecting the console output from the console device.  (Consequently bootlogd requires PTY support in the  kernel  con-
       figuration.)   It  copies that output to the real console device and to a log file.  There is no standard way of ascertaining the real con-
       sole device if you have a new-style /dev/console device (major 5, minor 1) so bootlogd parses the kernel  command  line	looking  for  con-
       sole=... lines and deduces the real console device from that.  If that syntax is ever changed by the kernel, or a console type is used that
       bootlogd does not know about then bootlogd will not work.

AUTHOR

       Miquel van Smoorenburg, miquels@cistron.nl

SEE ALSO

       dmesg(8),fdatasync(3).

								   Jul 21, 2003 						       BOOTLOGD(8)
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