Solved

Need to create shell script that finds a phrase and then prints the line right above that phrase to another file

Posted on 2003-11-26
8
251 Views
Last Modified: 2010-04-17
I need to create a shell script (or perl) that will search a given logfile for a particular phrase and then copy the date and time of which is just above the occurance of the phrase.

Example:

11/26/2003;10:31:05
Verification Startup is completed
Welcome to the Dialogue
11/26/2003;10:32:11 Transition started
11/26/2003;10:32:14 Manipulation error shutdown completed
11/26/2003;10:41:25
Verification Startup is completed
Welcome to the Dialogue

Given the logfile above I need to write another file that will contain this:

Startup times
11/26/2003;10:31:05
11/26/2003;10:41:25

Please help, thanks. I am writing this in an HP9000 machine. Unix.

0
Comment
Question by:jporgy
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
8 Comments
 

Author Comment

by:jporgy
ID: 9829519
This is a unix perl or shell script programming
0
 
LVL 45

Expert Comment

by:sunnycoder
ID: 9829597
echo Startup times > output_file_name
grep "string_to_search" log_file_name | awk ' { print $1 " " $2 } ' >> output_file_name
0
 
LVL 24

Accepted Solution

by:
shivsa earned 125 total points
ID: 9829628
#!/usr/bin/perl

require Exporter;

my ( $line_no,
     $one_line,
     $true,
     );

$line_no = 0;
print "Verification Startup \n";
@aa = ();
@aa = `cat /tmp/historydmp.txt`;
while ($line_no < @aa ){
$one_line = @aa[$line_no];
$true = grep /Verification/, $one_line ;
if ( $true == 1) {
print "@aa[$line_no-1] \n";
     }
$line_no = $line_no + 1;
}
0
 

Author Comment

by:jporgy
ID: 10319901
shivsa's answer is okay.
0
 

Author Comment

by:jporgy
ID: 10319907
My html screen is screwed, can the moderator award the answer to shivsa'?
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Does the idea of dealing with bits scare or confuse you? Does it seem like a waste of time in an age where we all have terabytes of storage? If so, you're missing out on one of the core tools in every professional programmer's toolbox. Learn how to …
This article will inform Clients about common and important expectations from the freelancers (Experts) who are looking at your Gig.
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…

756 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question