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Problem:

I have some 200+ files named something in line with "DSC01852.JPG.jpg". I would like to remove the file extension so the result becomes "DSC01852.JPG".

Any suggestions? I looked at the mv command but couldn't quite figure out how to write the correct command.

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migrated from stackoverflow.com May 20 '13 at 16:17

This question came from our site for professional and enthusiast programmers.

up vote 5 down vote accepted

If these files are all in the same directory you can rename them like this:

for f in /some/dir/*.JPG.jpg; do
  mv "$f" "${f%.*}"
done

${f%.*} removes shortest text matching the pattern .* (a dot followed by arbitrary text) from the end of the variable $f (in this case the file name), thus producing commands like the following:

mv "/some/dir/DSC01852.JPG.jpg" "/some/dir/DSC01852.JPG"
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