We Heart Code » perl http://www.weheartcode.com A discourse on programming Sun, 17 Jan 2010 02:16:44 +0000 http://wordpress.org/?v=2.8.4 en hourly 1 Perl One Liner – Search Replace String in File http://www.weheartcode.com/2006/10/24/perl-one-liner-search-replace-string-in-file/ http://www.weheartcode.com/2006/10/24/perl-one-liner-search-replace-string-in-file/#comments Tue, 24 Oct 2006 12:35:32 +0000 Tim http://www.weheartcode.com/2006/10/24/perl-one-liner-search-replace-string-in-file/ This is one of the most useful perl one-liners. Search and Replace a string in a text file.

perl -0777 -i -pe 's/patterntomatch/replacewith/g' inputfile

Let's break this down

-0777: treat file as a single line, this way we don't have to worry about ranges on our regex.

-i: operate on file in place. super dangerous and fun. If you're a big wuss you could use -i.bak to automatically create a backup file.

-pe: loop over and print output.

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