Here's one way to do it:

for f in *JPG ; do mv $f `basename $f JPG`jpg; done





On Mon, Feb 20, 2012 at 5:54 PM, Michael Havens <bmike1@gmail.com> wrote:

> I'm trying to rename some files that have the extension JPG to jpg.
>
> First thing I did was:
>
> bmike1@Michaels-Laptop ~/Pictures/2004 $ mv *JPG *jpg
> mv: target `rosebud1.mod.jpg' is not a directory
>
> huh? i want to move file x to file y! who said anything about a directory?
>
> looked at the man page and tried it with  the T option:
>
> bmike1@Michaels-Laptop ~/Pictures/2004 $ mv -T *JPG *jpg
> mv: extra operand `100_0046.JPG'
>
> on the advice of others I tried:
>
> bmike1@Michaels-Laptop ~/Pictures/2004 $ rename JPG jpg *JPG
> Bareword "JPG" not allowed while "strict subs" in use at (eval 1) line 1.
>
> I tried
>
> bmike1@Michaels-Laptop ~/Pictures/2004 $ find *.JPG -exec rename .JPG
> .jpg {} \;
> syntax error at (eval 1) line 1, near "." <95 times>
> bmike1@Michaels-Laptop ~/Pictures/2004 $
>
> and a few others. Why isn't mv moving a file name to another file name?
> --
> :-)~MIKE~(-:
>
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