How To Install pngcrush on CentOS 8

pngcrush is Optimizer for PNG (Portable Network Graphics) files

Introduction

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

What is pngcrush

pngcrush is a commandline optimizer for PNG (Portable Network Graphics) files. Its main purpose is to reduce the size of the PNG IDAT datastream by trying various compression levels and PNG filter methods. It also can be used to remove unwanted ancillary chunks, or to add certain chunks including gAMA, tRNS, iCCP, and textual chunks.

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

Install pngcrush 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 pngcrush using dnf by running the following command:

sudo dnf -y install pngcrush

Install pngcrush 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 pngcrush using yum by running the following command:

sudo yum -y install pngcrush

How To Uninstall pngcrush on CentOS 8

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

sudo dnf remove pngcrush

pngcrush Package Contents on CentOS 8

/usr/bin/pngcrush
/usr/lib/.build-id
/usr/lib/.build-id/3e
/usr/lib/.build-id/3e/abebc67dcf64d0ecb35e95b72a80719f21e8d3
/usr/share/doc/pngcrush
/usr/share/doc/pngcrush/ChangeLog.html
/usr/share/licenses/pngcrush
/usr/share/licenses/pngcrush/LICENSE
/usr/share/man/man1/pngcrush.1.gz

References

Summary

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