How To Install fetch-crl on CentOS 8

fetch-crl is Downloads Certificate Revocation Lists

Introduction

In this tutorial we learn how to install fetch-crl on CentOS 8.

What is fetch-crl

This tool and associated timer entry ensure that Certificate Revocation Lists (CRLs) are periodically retrieved from the web sites of the respective Certification Authorities. It assumes that the installed CA files follow the hash.crl_url convention.

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

Install fetch-crl 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 fetch-crl using dnf by running the following command:

sudo dnf -y install fetch-crl

Install fetch-crl 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 fetch-crl using yum by running the following command:

sudo yum -y install fetch-crl

How To Uninstall fetch-crl on CentOS 8

To uninstall only the fetch-crl package we can use the following command:

sudo dnf remove fetch-crl

fetch-crl Package Contents on CentOS 8

/etc/fetch-crl.conf
/etc/fetch-crl.d
/etc/grid-security
/etc/grid-security/certificates
/usr/lib/systemd/system/fetch-crl.service
/usr/lib/systemd/system/fetch-crl.timer
/usr/sbin/clean-crl
/usr/sbin/fetch-crl
/usr/share/doc/fetch-crl
/usr/share/doc/fetch-crl/CHANGES
/usr/share/doc/fetch-crl/NOTICE
/usr/share/doc/fetch-crl/README
/usr/share/doc/fetch-crl/fetch-crl.cnf.example
/usr/share/licenses/fetch-crl
/usr/share/licenses/fetch-crl/LICENSE
/usr/share/man/man8/clean-crl.8.gz
/usr/share/man/man8/fetch-crl.8.gz
/var/cache/fetch-crl

References

Summary

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