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+====== Search & Replace Text Accross Multiple Files ======
+You can use Perl to quickly search and replace text across multiple files. For example to replace foo with bar all text files:
+  perl -pi -w -e 's/foo/bar/g' *.txt
+as seen [[http://www.liamdelahunty.com/tips/linux_search_and_replace_multiple_files.php|here]].