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Full Discussion: Perl: Search for string on line then search and replace text
Top Forums Shell Programming and Scripting Perl: Search for string on line then search and replace text Post 302155300 by Crypto on Thursday 3rd of January 2008 01:20:50 PM
Old 01-03-2008
Perl: Search for string on line then search and replace text
Hi All,

I have a file that I need to be able to find a pattern match on a line, search that line for a text pattern, and replace that text.

An example of 4 lines in my file is:

1. MatchText_randomNumberOfText moreData ReplaceMe moreData
2. MatchText_randomNumberOfText moreData moreData ReplaceMe moreData moreData
3. MatchText_randomNumberOfText moreData ReplaceMe moreData moreData
4. TextTextText_randomNumberOfText moreData ReplaceMe moreData moreData

The above is an example of four lines. I want to find all the lines containing "MatchText" (lines 1,2 and 3) and replace the "ReplaceMe" in that line with "REPLACED".

"ReplaceMe" occurs multiple times in lines I do not want to replace it in (as in line 4 above)

Hope that makes sense!!
Many thanks
 

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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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