Visit The New, Modern Unix Linux Community


Script to grep if 404 error got generated in the log files in last 5 minutes


 
Thread Tools Search this Thread
Top Forums UNIX for Beginners Questions & Answers Script to grep if 404 error got generated in the log files in last 5 minutes
# 1  
Script to grep if 404 error got generated in the log files in last 5 minutes

I have a log file which are linked with prefix current date and suffix with IP_address.log 2020_04_22.shared_http_server.192.168.XX.XX.log

I want to monitor these logs at an interval of every 5 minutes. I am looking to schedule a script at an interval of every 5 minutes,in order to grep if 404 error got generated in the log files in last 5 minutes and send the lines of the logs which contains 404 error in different file.

I have written a script to get this done and i am using cron to run this script for every 5 min.Whenever the script runs, it reads the whole log file and throws all the lines of the logs which contains 404 error in different file.But, i want those lines of the logs containing 404 error message to be sent in different file which got generated in last 5 minutes.

Code:
find /home/pranav -type f -name "2020_04_22.shared_http_server.192.168.XX.XX.log" |while read file
  do
    RESULT=$(egrep "[^0](404)" $file)
      if [[ ! -z $RESULT ]]
         then
            echo "Error(s) in $file on $HOSTNAME at "$(date)": $RESULT">> log_result.txt
     fi
  done

This script is able to grep the lines which contains 404 error message but i want those lines of the logs containing 404 error message to be sent in different file which got generated in last 5 minutes.

Could somebody help me on this what i'm i missing here?
Thank you in advance.

Last edited by rbatte1; 04-30-2020 at 04:26 PM..
# 2  
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:

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #616
Difficulty: Medium
There is no separate char data type in Python.
True or False?

10 More Discussions You Might Find Interesting

1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

Featured Tech Videos