Resize Multiple Image Ubuntu

If you have many big size image and want to resize into smaller size, you can resize all image with just 1 command in terminal. This tutorial take example if you have many image with .JPG extension and you want to resize 25% of the original dimension

1. Install imagemagick first

sudo apt-get install imagemagick

2. Write this command in terminal

mogrify -verbose -resize '25%' *.JPG

You can change 25% with another persentage you want and change .JPG with the extension of your image.

For further reading, go here