Substitution of strings with seds…

Asked By Donald F Carr 30 points N/A Posted on - 05/29/2015

How would you substitute strings with sed? May I discover a few examples and allude to them in the substitution string? In the event that the string is 'old' and I run's/old/new', I get 'new old' as the outcome. I require 'new?' How would you supplant an example just on the off chance that it’s discovered, so that its executed faster?

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