How To Install x509viewer on CentOS 8

x509viewer is Simple tool to decode X.509 certificates

Introduction

In this tutorial we learn how to install x509viewer on CentOS 8.

What is x509viewer

x509viewer is a simple command line application, written in Perl, that can be used to decode one or multiple X.509 certificates per given file, such as e.g. SSL certificates, CSRs (certificate signing requests), but also private keys.

We can use yum or dnf to install x509viewer on CentOS 8. In this tutorial we discuss both methods but you only need to choose one of method to install x509viewer.

Install x509viewer 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 x509viewer using dnf by running the following command:

sudo dnf -y install x509viewer

Install x509viewer 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 x509viewer using yum by running the following command:

sudo yum -y install x509viewer

How To Uninstall x509viewer on CentOS 8

To uninstall only the x509viewer package we can use the following command:

sudo dnf remove x509viewer

x509viewer Package Contents on CentOS 8

/usr/bin/x509viewer
/usr/share/doc/x509viewer
/usr/share/doc/x509viewer/ChangeLog
/usr/share/doc/x509viewer/README
/usr/share/licenses/x509viewer
/usr/share/licenses/x509viewer/COPYING

References

Summary

In this tutorial we learn how to install x509viewer on CentOS 8 using yum and dnf.