finding and renaming large *.jpg to *.jpeg

I have a large and messy collection of file--hey who doesn't--some of these are large JPGs (large in this case is an arbitrary number, say 2.5MB) that I want to rename--I want to change the extension from *.jpg to *.jpeg.

I'd love to do this with a shell script, I'm running BASH 3.2.39(1), and I have a feeling this is "simple" task with find, alas I find find'开发者_运维百科s syntax difficult to remember and the man page impossible to read.

Any and all help with be most appreciated.

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Finding and renaming large files could be done like this:

find . -size +2500k -exec rename -s .jpg .jpeg '{}' ';'

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What OS are you using? In most repositories there is an app called mmv which is perfect for these kinds of things..

usage:
mmv \*.jpg \#1.jpeg

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Install rename (standard tool in your linux installation or with homebrew for mac), then:

rename -s .jpg .jpeg *

or, if you have files in subdirectories too:

rename -s .jpg .jpeg $(find . -name '*.jpg')

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for i in *.jpg
do
 new_name= $(echo $i|sed 's/.jpg/.jpeg/')
 mv $i $new.name
done