Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Script to grep if 404 error got generated in the log files in last 5 minutes
Top Forums UNIX for Beginners Questions & Answers Script to grep if 404 error got generated in the log files in last 5 minutes Post 303046317 by rbatte1 on Thursday 30th of April 2020 03:25:20 PM
Old 04-30-2020
Could you store a 'previous last line' value somewhere to use between runs? That way you could:-
  • Copy the log file to a temporary directory (to get a fixed file to work with)
  • Read the 'previous last line' value from your stored location
  • Count the lines in your copied file.
  • If the count is lower, you have rotated the log file, so set the 'previous last line' value to zero to read the whole file.
  • If the count was larger, read from the 'previous last line' value to the end of the file looking for the error message being logged.
  • Store the new 'last line' value in a file somewhere for the next run.
  • Tidy up your temporary file/directory.
Would that logic work for you?


Let us know if that helps, is totally wrong or if you get stuck.


I hope that this helps,
Robin
This User Gave Thanks to rbatte1 For This Post:
vgersh99
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Script to Grep column 3 from csv file generated yesterday

Hello, Can any one please assist how to scirpt it: Every day a new log file is create and I want to process only the one generated yesterday and get the data of column 3 and 6. For example today's date is 24 then I want to get the data of log file created on 23rd. Log Files in... (7 Replies)
Discussion started by: sureshcisco
7 Replies

2. Shell Programming and Scripting

Retrieve logs generated in last 10 mins from a log file using 'grep' command

HI All, I have a log file where the logs will be in the format as given below: 2011-05-25 02:32:51 INFO PROCESS STARTING 2011-05-25 02:32:52 INFO PROCESS STARTED . . . I want to retrieve only the logs which are less than 5 mins older than current time using grep... (3 Replies)
Discussion started by: rvhg16
3 Replies

3. Shell Programming and Scripting

Script to grep for a string in log files generated in last 15 minutes.

Dear Guru's I've a requirment to grep for a string in series of log files that are getting generated almost every minute. I'm looking to schedule a script every 15 mountes,in order to check if the error string has been generated in any of the log files generated in last 15 minutes. Please... (3 Replies)
Discussion started by: rajivatnova
3 Replies

4. Shell Programming and Scripting

Move all .log except those generated in the last 5 minutes

RHEL 5.8 In the directory /u03/pkms/app_logs I have several hundreds of log files as shown below. $ pwd /u03/pkms/app_logs $ ls -alrt *.log | tail -50 -rw-r----- 1 oracle dba 9439232 May 4 13:57 mvtpcem_1_722892404_94157.log -rw-r----- 1 oracle dba 9227264 May 4 13:57... (8 Replies)
Discussion started by: kraljic
8 Replies

5. Shell Programming and Scripting

Grep last 30 minutes log only

I have below command, which i use for checking last two hours log file, but i want to check 30 minutes log and discard old log, only match current time with last 30 minutes. Command i am using. This below attach log file format is for this week, but sometime it got change in time of log, so i need... (6 Replies)
Discussion started by: learnbash
6 Replies

6. Shell Programming and Scripting

How to capture hostnames or ip address in the log files generated?

Team, I have prepared a script which I run from my remote machine(Jump-box)server Below is the script FILEDATE=`date +%F` LOGFILE=/home/abc/scripts/xyz.$FILEDATE.log find /home/abc/scripts/xyz.*.log -type f -mtime -3 -delete touch $LOGFILE exec 1>$LOGFILE 2>&1 #healthcheck batch runs... (1 Reply)
Discussion started by: whizkidash
1 Replies

7. Web Development

How to log http 404 error to a separate log file?

Apache Web Server: how to log http 404 error to a separate log file and i do not want to log in access.log please advice. (2 Replies)
Discussion started by: raghur77
2 Replies

8. Shell Programming and Scripting

Grep last 2 minutes log only

I have newbie, which i use for checking last one hours log file, but i want to check 2 minutes log and discard old log, only match current time with last 2 minutes. Ex log. 2018-07-03 20:09:17 2018-07-03 20:05:17 2018-07-03 20:05:18 2018-07-03 20:05:20 2018-07-03 20:06:22 2018-07-03... (5 Replies)
Discussion started by: ooilinlove
5 Replies

9. Shell Programming and Scripting

Grep a log file for the last 5 minutes of contents every 5 minutes

Hi all, System Ubuntu 16.04.3 LTS i have the following log INFO 2019-02-07 15:13:31,099 module.py:700] default: "POST /join/8550614e-3e94-4fa5-9ab2-135eefa69c1b HTTP/1.0" 500 2042 INFO 2019-02-07 15:13:31,569 module.py:700] default: "POST /join/6cb9c452-dcb1-45f3-bcca-e33f5d450105... (15 Replies)
Discussion started by: charli1
15 Replies

10. UNIX for Beginners Questions & Answers

Error Code Generated by Script

Hi, I have written a script with several variables derived from here documents. However, when I run the following code, the exit status becomes 1: BMC_ACEs="Rich" read -r -d '' BMC_ACL <<EOF ### ### ACL Rack01-BMCMgmt_IN ### $BMC_ACEs EOF If I then type echo $?, it displays a 1. ... (4 Replies)
Discussion started by: richmaxw
4 Replies

LEARN ABOUT DEBIAN

logtail2

LOGTAIL(8)							  logtail2 manual							LOGTAIL(8)

NAME

       logtail2 - print log file lines that have not been read

SYNOPSIS

       logtail2 [-t] -flogfile [-ooffsetfile]

DESCRIPTION

       logtail2  reads a specified file (usually a log file) and writes to the standard output that part of it which has not been read by previous
       runs of logtail2.  It prints the appropriate number of bytes from the end of logfile, assuming that all changes that are made to it are	to
       add new characters to it.

       logfile must be a plain file.  A symlink is not allowed.

       logtail2  stores  the information about how much of it has already been read in a separate file called offsetfile.  offsetfile can be omit-
       ted.  If omitted, the file named logfile.offset in the same directory which contains logfile is used by default.

       If offsetfile is not empty, the inode of  logfile  is  checked.	 If  the  inode  is  changed,  logtail2  uses  the  heuristics	stored	in
       /usr/share/logtail/detectrotate/  to  find  a file that might be the rotated logfile and prints it starting with the stored offset. It then
       proceeds to simply print the entire new file and generates a new offsetfile.  If the inode is not changed but logfile is  shorter  than	it
       was at the last run of logtail2, it writes a warning message to the standard output.

OPTIONS

       -f     logfile to be read after offset

       -o     offsetfile stores offset of previous run

       -t     test mode - do not change offset in offsetfile

RETURN VALUES

       0      successful

       65     cannot get the size of logfile

       66     general file or directory access issue

       73     cannot write offsetfile

AUTHOR

       The original logtail was written in C by Craig H. Rowland <crowland@psionic.com>.  This version of logtail is a modification of Paul Sloot-
       man's re-implementation in perl.  enhanced by the Debian Logcheck Team <logcheck-devel@lists.alioth.debian.org>.

       This   manual   was   written   by   Oohara   Yuuma   <oohara@libra.interq.or.jp>   and	 enhanced   by	 the	Debian	  Logcheck    Team
       <logcheck-devel@lists.alioth.debian.org>..

SEE ALSO

       logcheck(8)

Debian								    28 Jul 2007 							LOGTAIL(8)
All times are GMT -4. The time now is 07:52 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy