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Full Discussion: How to print line if two lines above it matches patterns.?
Top Forums Shell Programming and Scripting How to print line if two lines above it matches patterns.? Post 302958415 by Juha on Thursday 22nd of October 2015 02:03:25 AM
Old 10-22-2015
How to print line if two lines above it matches patterns.?
Hi,

I could only find examples to print line before/after a match, but I'd need to print line after two separate lines matching.

E.g.: From the below log entry, I would need to print out the 1234. This is from a huge log file, that has a lot of entries with "CLIENT" and "No" entries (+ other messages), and I need to print the client number only if the "CLIENT" and "No" tags are in consecutive lines as in the below example.

Would anyone have idea how to do this (awk/sed/?)

Code:
....
[12:16:30.901]  <CLIENT>
[12:16:30.901]          <No>
[12:16:30.901]          1234
[12:16:30.901]          </No>
[12:16:30.901]  </CLIENT>
....

 

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LEARN ABOUT DEBIAN

bwild

BWILD(8)						     Network backup, utilities							  BWILD(8)

NAME

	bwild - Bacula's 'wildcard' engine

SYNOPSIS

       bwild [options] -f <data-file>

DESCRIPTION

       This manual page documents briefly the bwild command.
       This is a simple program that will allow you to test wild-card expressions against a file of data.

OPTIONS

       A summary of options is included below.

       -?     Show version and usage of program.

       -d nn  Set debug level to nn.

       -dt    Print timestamp in debug output

       -f <data-file>
	      The  data-file  is  a  filename that contains lines of data to be matched (or not) against one or more patterns. When the program is
	      run, it will prompt you for a wild-card pattern, then apply it one line at a time against the data  in  the  file.  Each	line  that
	      matches will be printed preceded by its line number. You will then be prompted again for another pattern.
	      Enter  an  empty line for a pattern to terminate the program. You can print only lines that do not match by using the -n option, and
	      you can suppress printing of line numbers with the -l option.

       -n     Print lines that do not match

       -l     Suppress lines numbers.

       -i     use case insensitive match.

SEE ALSO

       fnmatch(3)

AUTHOR

       This manual page was written by Bruno Friedmann <bruno@ioda-net.ch>.

Kern Sibbald							  30 October 2011							  BWILD(8)
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