Here will be Linux scripts that I created and can be usefull to the other people.
Script for covering faces of protesters or anybody else on pictures: Terminal + Zenity GUI.
Script to cover faces in video – warning: for video 6MB you will wait 15 minutes, check small size before bigger video: Zenity GUI.
Debian 13 – how to change background picture and letters color in Grub Menu and Login screen (username/password): Debian13-boot-grub-login