sed
CautionStream edit
sed -i 's/old/new/g' <file>
Edits/replaces text; -i edits the file in place.
Examples
sed -n '10,20p' app.logPrint lines 10-20
Syntax
sed [-i] 's/<pat>/<repl>/g' <file>
Before you run it
-i modifies the file in place; back up first.
The same reference, with no signal at all
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