image handling with ImageMagic
ImageMagic is the tool of choice when you have to manipulate images on the command line. You can easily install it from a shell with the following command: sudo apt-get install imagemagick Change all images in the current folder to a with of 800 pixels with a quality of 80%: for file in *.jpg; do convert $file -resize 800 -quality 80 $file; done Convert a *.gif image to a *.jpg image convert -strip test.gif test.jpg
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