How To Install pngquant on CentOS 8

pngquant is PNG quantization tool for reducing image file size

Introduction

In this tutorial we learn how to install pngquant on CentOS 8.

What is `pngquant`

pngquant converts 24/32-bit RGBA PNG images to 8-bit palette with alpha channel preserved. Such images are compatible with all modern web browsers and a compatibility setting is available to help transparency degrade well in Internet Explorer 6. Quantized files are often 40-70 percent smaller than their 24/32-bit version. pngquant uses the median cut algorithm.

We can use yum or dnf to install pngquant on CentOS 8. In this tutorial we discuss both methods but you only need to choose one of method to install pngquant.

Install pngquant on CentOS 8 Using dnf

Update yum database with dnf using the following command.

sudo dnf makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

After updating yum database, We can install pngquant using dnf by running the following command:

sudo dnf -y install pngquant

Install pngquant on CentOS 8 Using yum

Update yum database with yum using the following command.

sudo yum makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

After updating yum database, We can install pngquant using yum by running the following command:

sudo yum -y install pngquant

How To Uninstall pngquant on CentOS 8

To uninstall only the pngquant package we can use the following command:

sudo dnf remove pngquant

pngquant Package Contents on CentOS 8

/usr/bin/pngquant
/usr/lib/.build-id
/usr/lib/.build-id/ce
/usr/lib/.build-id/ce/d581c6e2d7c41a5f867a9959bbfd397489efc8
/usr/share/doc/pngquant
/usr/share/doc/pngquant/CHANGELOG
/usr/share/doc/pngquant/README.md
/usr/share/licenses/pngquant
/usr/share/licenses/pngquant/COPYRIGHT
/usr/share/man/man1/pngquant.1.gz

References

pngquant website

Summary

In this tutorial we learn how to install pngquant on CentOS 8 using yum and dnf.