Install pngcheck on Ubuntu 20.04

The pngcheck is a tool for checking the integrity of PNG, JNG and MNG images for corruption via command line. It also can be used to display the information about an image such as size (width x height), bit depth, compression info, etc.

This tutorial demonstrates how to install pngcheck on Ubuntu 20.04.

Install pngcheck

Use the following command to update the package lists:

sudo apt update

Install pngcheck:

sudo apt install -y pngcheck

Once installation is completed, run the pngcheck command to check which version has been installed and available command options:

pngcheck

Testing pngcheck

Download image for testing:

wget -O test.png https://raw.githubusercontent.com/opencv/opencv/master/samples/data/sudoku.png

Next, run the pngcheck command and provide the path of a file as argument to check if a PNG image is valid:

pngcheck test.png

If no errors were found, command outputs OK, otherwise ERROR.

OK: test.png (558x563, 24-bit RGB, non-interlaced, 73.4%).

Uninstall pngcheck

If you wish to completely remove pngcheck, run the following command:

sudo apt purge --autoremove -y pngcheck