How do I replace a word across many files at once?

Find and replace text in many files

BBEdit and VS Code have multi-file find and replace. With nothing installed, sed replaces text in every matching file in one command — on copies first.

How

Make copies to work on:

cp -R notes notes-copy && cd notes-copy

Replace “Acme Inc” with “Acme Ltd” in every .txt file:

sed -i '' 's/Acme Inc/Acme Ltd/g' *.txt

sed -i changes the files in place, with no undo — that is why the copy comes first. Check a couple of files before using the originals.

Or just ask Titan

Change every mention of our old company name in these docs to the new one. Do it with Titan

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Titan isn’t on this computer yet. Get Titan, then press the button again — the task will be waiting, typed in.

Merge several text files into one Compare two files for differences

Find and replace text in many files

How

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