How would I go about replacing part of a string with another part of that same string, in a bash script, using
closed as not a real question by Gilles, vonbrand, jasonwryan, rahmu, manatwork Mar 24 '13 at 10:32
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Your question is a bit too generic here.
Would replace the first two characters of each line with the two last ones (only if there are at least 4 characters on those lines).
The trick is to use