Let's assume that I have some files(in a directory tree - for example, ~/home) that may something I am looking for: e.g. I'm looking for a string a.2 and I want to change it for b.3. I know that I can list them by running grep -R 'a\.2' *. This will show me matches, prepended with filenames. However, I don't know how to replace them. How can I do that?
How to replace regex in all files that match this regex
text processing