Install libgd-tools by entering the following commands in the terminal:
sudo apt update sudo apt install libgd-tools
Description:
GD command line tools and example code
GD is a graphics library. It allows your code to quickly draw images complete with lines, arcs, text, multiple colours, cut and paste from other images, flood fills, and write out the result as a PNG file. This is particularly useful in World Wide Web applications, where PNG is one of the formats accepted for inline images by most browsers. . This is some simple command line tools and example code that use the GD graphics library.
Homepage: http://www.libgd.org/
Version: 2.2.5-4
Section: universe/graphics