Halve the saturation of all image files in the current directory

Perform operations on multiple images, such as resizing, cropping, flipping, and adding effects.
Changes are applied directly to the original file.
More information: <https://imagemagick.org/script/mogrify.php>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

mogrify -modulate {{100,50}} {{*}}

click the source code to copy install mogrify on any operating system with command-not-found.com