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Full Discussion: Help On tail script
Top Forums Shell Programming and Scripting Help On tail script Post 302599094 by liviusbr on Thursday 16th of February 2012 09:24:01 AM
Old 02-16-2012
Let me make it more clear for you.
I am using some application that puts all the logging under /var/adm/messages. Once i capture the string "Error" I need to find out what actually caused it, 1000 lines before and after, to have the full picture.Then put all these lines in a text file.
It's going to be something like this :

Code:
$logfile= /var/adm/messages
while true ; do    tail  $logfile | grep ERROR ||  tail -1000 $logfile  > prev file.txt &&echo "Dumped log records to prev"&& break ; done

---------- Post updated at 04:24 PM ---------- Previous update was at 03:03 PM ----------

Hi,

Is my above expression correct ?

Thanks!

Last edited by methyl; 02-16-2012 at 06:04 PM.. Reason: please use code tags
 

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MTAIL(1)							   User Commands							  MTAIL(1)

NAME
mtail - tail variant designed for web developers monitoring logfiles SYNOPSIS
mtail [options] <file>... DESCRIPTION
MonkeyTail allows a user to tail multiple files on both local and remote hosts and clearly marks inactivity by putting 5 newlines in the output whenever a pause in output over 3 seconds is detected. MonkeyTail is implemented a fairly simple wrapper script around standard tail, ssh, and sudo. OPTIONS
-q Quiet mode --quiet " " -n Output the last N lines of each file before tailing (defaults to 0) <file>... Files to tail. These can specified in the following ways: @<groupname> - expands the group (from .mtailrc) to a list of files to tail <filename> - tails a local file. +<filename> - attempts to sudo and tail a local file (will prompt for pwd if required). <remotehost>:<filename> - attempts to invoke tail via ssh on a remote host. +<remotehost>:<filename> - attempts to invoke sudo tail via ssh on a remote host (will prompt for pwd if required). SEE ALSO
mtailrc(5), tail(1) AUTHOR
Martyn Smith <martyn@dollyfish.net.nz> mtail May 2008 MTAIL(1)
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