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Full Discussion: Replace string and create new file multiple times
Top Forums UNIX for Dummies Questions & Answers Replace string and create new file multiple times Post 302974075 by pseudo.seppuku on Wednesday 25th of May 2016 12:17:54 PM
Old 05-25-2016
Replace string and create new file multiple times
First of all, apologies if this has already been answered elsewhere. I haven't quite been able to find what I'm looking for yet, so hopefully this won't come across as repetition.

I have a file consisting of ~100 nearly identical lines, each of which contains multiple instances of the string I need to replace. Let's say the string is simply "001". Each instance of the string within a single line has a slightly different pre/suffix that can be used for search purposes. I know sed is capable of addressing this, but I'm not sure how to proceed with the following steps...

I need to create a new file where the 001 is replaced with 002, while everything else in the line remains unchanged. This will go on until, say, 300 - thus generating 300 different files, each of which needs to be saved separately.

So the first file contains a list like this:

Code:
-file1 001.txt -file2 blah1.txt -outputx x001blah1 -outputy y001blah1
-file1 001.txt -file2 blah2.txt -outputx x001blah2 -outputy y001blah2
-file1 001.txt -file2 blah3.txt -outputx x001blah3 -outputy y001blah3

...saved as list001.txt. I need to replace the three instances of 001 with 002 and save that file as list002.txt, which would look like this:

Code:
-file1 002.txt -file2 blah1.txt -outputx x002blah1 -outputy y002blah1
-file1 002.txt -file2 blah2.txt -outputx x002blah2 -outputy y002blah2
-file1 002.txt -file2 blah3.txt -outputx x002blah3 -outputy y002blah3

And so on and so forth until list300.txt (this number is pre-defined).

If I were to do this manually, it would require searching and replacing over a thousand times. Is there a single script I can use to find, replace, and create all 300 files, without having to make and modify each one individually?
Last edited by pseudo.seppuku; 05-25-2016 at 01:23 PM..
 

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LEARN ABOUT DEBIAN

sc_warts2text

SC_WARTS2TEXT(1)					    BSD General Commands Manual 					  SC_WARTS2TEXT(1)

NAME

     sc_warts2text -- simple dump of information contained in a warts file.

SYNOPSIS

     sc_warts2text [-d ip2descr-file] [file ...]

DESCRIPTION

     The sc_warts2text utility provides a simple dump of information contained in a sequence of warts files.  The output is the same as that which
     would have been provided by scamper if the text output option had been chosen instead of the warts output option when the data was collected.
     The options are as follows:

     -d ip2descr-file
	     specifies the name of a file with IP-address, description mappings, one mapping per line.	See the examples section for further
	     information.

     While the output of sc_warts2text is structured and suitable for initial analyses of results, the format of the output is not suitable for
     automated parsing and analysis as the output of sc_warts2text will change overtime with no regard to backwards compatibility.  Analyses of
     the contents of a warts file should be made using specialised programs which link against the scamper file API.

EXAMPLES

     The command:

	sc_warts2text file1.warts file2.warts

     will decode and print the contents of file1.warts, followed by the contents of file2.warts.

     The command:

	gzcat file1.warts.gz | sc_warts2text

     will print the contents of the uncompressed file supplied on stdin.

     Given a set of IP-address, description pairs in a file name mappings.txt:

	192.0.2.1 "foo"
	192.0.2.2 "bar"

     then the command gzcat file1.warts.gz | sc_warts2text -d mappings.txt will print the description associated with a given destination address
     before each result is presented.

SEE ALSO

     scamper(1), sc_wartsdump(1)

AUTHORS

     sc_warts2text is written by Matthew Luckie <mjl@luckie.org.nz>.

BSD
								 October 15, 2010							       BSD
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