Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Copy last 30 minutes' contents from a log file
Top Forums UNIX for Beginners Questions & Answers Copy last 30 minutes' contents from a log file Post 303040258 by stomp on Friday 25th of October 2019 03:22:42 PM
Old 10-25-2019
If you have logrotation in place you may want to know if a log-switch happened. I did this by checking if the first line of a file is still the same. (Hopefully it's not an empty line ;-) ) ... like this:

Code:
LOGFILE=/DB2/db2diag.log 
NEWFILE=${LOGFILE%.log}_$(date +%Y%m%d%H%M).log
CHKFILE=/var/scriptdata/db2diagline.dat
CHKFILE2=/var/scriptdata/db2firstline.dat
read FIRSTLINE_SAVED < $CHKFILE2
FIRSTLINE="$(head -n1 $LOGFILE)"

if [ "$FIRSTLINE" == "$FIRSTLINE_SAVED" ] ; then 
   EndLine=$(awk 'END{print NR}' $LOGFILE)
   if [ -f $CHKFILE ] ; then
       read StartLine < $CHFILE
       StartLine=${StartLine:-0}
       # Test for log file truncated
       [ $EndLine -lt $StartLine ] && StartLine=0
   else
      StartLine=0
   fi
else
   StartLine=0
   head -n1 $LOGFILE > $CHKFILE2
fi


awk -vS=$StartLine -vE=$EndLine 'NR>E{exit} NR>S' $LOGFILE > $NEWFILE

#Save EndLine for StartLine next time
echo "$EndLine" > $CHKFILE

Last edited by stomp; 10-25-2019 at 04:35 PM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Copy selected contents from file

I want to capture contents of a file between 2 strings into another file for eg all lines in between the keywords "start log" and "end log" should be copied into another file (4 Replies)
Discussion started by: misenkiser
4 Replies

2. Shell Programming and Scripting

Automatic Copy of File Contents to Clipboard

Could someone show me how to copy the contents of a file to the clipboard automatically without manually selecting its contents? I just want to press the "Paste Key" to show the results. I wish to use this in a ksh script. I'm using Solaris. Thanks! (5 Replies)
Discussion started by: ilak1008
5 Replies

3. Shell Programming and Scripting

Bash copy file contents into an existing file at a specific location

Hi all I need to copy the entire contents of one file into an existing file at a specific location. I know the exact line number where I need to put it. It appears I would use either sed or awk to do this, but I have been unsuccessful so far: File A line 1 line 2 line 3 line 4 ... (6 Replies)
Discussion started by: gshepherd7
6 Replies

4. Shell Programming and Scripting

Copy contents of a directory only if a file exists

I'm looking to write a script that will check the contents of a directory, and if any files exist in that directory copy them to a temporary folder. The target files are only resident for a few seconds, so I think the script needs to be running constantly. Any pointers would be really... (3 Replies)
Discussion started by: danceofillusion
3 Replies

5. Shell Programming and Scripting

copy the contents between two keywords to a new file.

Hi All, I want to edit my gate level netlists by searching for the content between two patterns eg: ff1 \test/a0 ( .CLK(\test/ClkInt0_acb_00x1 ),.D(\test/Rakicc ), .QB(\test/X ), .VDD(1'b1), .VSS(1'b0)); ff1 \test/a1 ( .CLK(\test/medis0_acb_00x1 ),.D(\test/hedwc ), .QB(\test/X ),... (6 Replies)
Discussion started by: naveen@
6 Replies

6. UNIX for Dummies Questions & Answers

Copy entire contents of file to clipboard

Hi, I am trying to figure out how to copy the contents of a file to the clipboard, then paste into a command. i.e copy contents of file /path/filename.txt to <command> <paste text> Hope that makes sense. Basically tryting to copy the text for use in a command without having to open the... (8 Replies)
Discussion started by: JCA70
8 Replies

7. Shell Programming and Scripting

Need help to copy contents of a file

Hi, I am stuck up with a problem of copying the contents of a directory where one of the folder name is changed daily. Problem: I have the folder structure as: RefWorlds2/LINGCC4_X64/odsdev/odessy/UTI/621GA_build_xxx/.../.. In the above path the build number (xxx) will be changed... (3 Replies)
Discussion started by: SathaKarni
3 Replies

8. Shell Programming and Scripting

Need Script to copy the contents of two files into one file

Hi i need Script to copy the contents of two files into one file i have 2 fil X1.txt / X2.txt i need script to copy the contents of X1 and X2 In AllXfile X1.txt File X1 X2.txt File X2 AllXfile.txt File X1 File X2 (2 Replies)
Discussion started by: azzeddine2005
2 Replies

9. Shell Programming and Scripting

Copy contents of one file to another

I need to write a script (in bash) that copies the content of the first file in each folder of a directory to the second file in the same folder. I tried this and it didn't work - it just came back with errors and I'm not sure how to fix it. Help is very much appreciated! for mpdir in... (4 Replies)
Discussion started by: LeftoverStew
4 Replies

10. 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

LEARN ABOUT CENTOS

glusterd

Glusterd(8)							   Gluster Inc. 						       Glusterd(8)

NAME

       Glusterd - Gluster elastic volume management daemon

SYNOPSIS

       glusterd [OPTION...]

DESCRIPTION

       The glusterd daemon is used for elastic volume management. The daemon must be run on all export servers.

OPTIONS

   Basic options
       -l <LOGFILE>, --log-file=<LOGFILE>
	      File to use for logging.

       -L <LOGLEVEL>, --log-level=<LOGLEVEL>
	      Logging severity.  Valid options are TRACE, DEBUG, INFO, WARNING, ERROR and CRITICAL (the default is INFO).

       --debug
	      Run the program in debug mode. This option sets --no-daemon, --log-level to DEBUG and --log-file to console.

       -N, --no-daemon
	      Run the program in the foreground.

   Miscellaneous Options:
       -?, --help
	      Display this help.

       --usage
	      Display a short usage message.

       -V, --version
	      Print the program version.

FILES

       /var/lib/glusterd/*

SEE ALSO

       fusermount(1), mount.glusterfs(8), glusterfs(8), gluster(8)

COPYRIGHT

       Copyright(c) 2006-2011  Gluster, Inc.  <http://www.gluster.com>

07 March 2011					     Gluster elastic volume management daemon					       Glusterd(8)
All times are GMT -4. The time now is 02:31 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy