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?