Efficient and compact unix one liner (faster than using -exec on the find command) combining shell and perl, but dangerous if filenames contain newlines or other whitespace (I think some find's have an option to quote the output, but I haven't seen one yet):
find . -type f | xargs perl -pi -e 's/old/new/g'

[download]
See perldoc perlrun for the -p and -i option and modify to '-pi.bak' or somesuch if you want a backup of all files.

In reply to Re: Need one-liner to s///g in all sub-dirs by runrig
in thread Need one-liner to s///g in all sub-dirs by dvergin

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