I recently came across a typo that existed in a bunch of html files on my web server. I thought it should be easy enough to change, but since it was in a number of files, editing it by hand would be time consuming. Fortunately, there is an easy, one liner command to replace the text in multiple files in a sub directory using recursion.
grep -lr -e '<oldword>' * | xargs sed -i 's/<oldword>/<newword>/g'
This command broken down:
- grep for the word in a files, use recursion (to find files in sub directories), and list only file matches
- | xargs passes the results from the grep command to sed
- sed -i uses a regular expression (regex) to evaluate the change: s (search) / search word / target word / g (global replace)
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