install first the programm sudo apt-get install imagemagick after use the convert command like in this example, it will resize and replace the images to 100x100px for i in *jpg; do echo "$i" ; convert -quality 90 -geometry x100 "$i" -geometry x100 "$i" ; done if like to hold the orginal file just type this: convert -quality 90 -scale '100x100' *.jpg

How to resize in a batch images with a comand line tool?

install first the programm sudo apt-get install imagemagick after use the convert command like in this example, it will resize and replace the images to 100x100px for i in *jpg; do echo "$i" ; convert -quality 90 -geometry x100 "$i" -geometry x100 "$i" ; done if like to hold the orginal file just type this: convert -quality 90 -scale '100x100' *.jpg 07.12.13

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