How To Install pngquant on Debian 9
Introduction
In this tutorial we learn how to install pngquant on Debian 9.
What is pngquant
pngquant is:
pngquant is a command-line conversion utility to quantize and dither truecolor PNG images, especially those with a full alpha channel, down to 8-bit (or smaller) RGBA-palette PNGs. Such images are usually two to four times smaller than the full 32-bit versions, and partial transparency is preserved quite nicely. This makes pngquant especially useful both for Web sites and for PlayStation 2 development, where one of the texture formats is RGBA-palette-based (though not PNG-compressed). This is the same technique used for many of the images on the Miscellaneous Transparent PNGs page (http://www.libpng.org/pub/png/pngs-img.html), and the results are often indistinguishable from the original, truecolor PNG images.
Optimizers (like pngcrush and optipng) optimize the compression, usually losslessly, while pngquant quantizes colors down to 256 (or fewer) distinct RGBA combinations, which is lossy.
There are three methods to install pngquant on Debian 9. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install pngquant Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install pngquant using apt-get by running the following command:
sudo apt-get -y install pngquant
Install pngquant Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install pngquant using apt by running the following command:
sudo apt -y install pngquant
Install pngquant Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Debian. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install pngquant using aptitude by running the following command:
sudo aptitude -y install pngquant
How To Uninstall pngquant on Debian 9
To uninstall only the pngquant package we can use the following command:
sudo apt-get remove pngquant
Uninstall pngquant And Its Dependencies
To uninstall pngquant and its dependencies that are no longer needed by Debian 9, we can use the command below:
sudo apt-get -y autoremove pngquant
Remove pngquant Configurations and Data
To remove pngquant configuration and data from Debian 9 we can use the following command:
sudo apt-get -y purge pngquant
Remove pngquant configuration, data, and all of its dependencies
We can use the following command to remove pngquant configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge pngquant
Dependencies
pngquant have the following dependencies:
References
Summary
In this tutorial we learn how to install pngquant package on Debian 9 using different package management tools: apt, apt-get and aptitude.