How To Install ldns on CentOS 8

ldns is Low-level DNS(SEC) library with API Low-level DNS(SEC) library with API

Introduction

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

What is ldns

ldns is a library with the aim to simplify DNS programming in C. All low-level DNS/DNSSEC operations are supported. We also define a higher level API which allows a programmer to (for instance) create or sign packets. ldns 1.7.0 21.el8 x86_64 166 k ldns-1.7.0-21.el8.src.rpm appstream Low-level DNS(SEC) library with API http BSD ldns is a library with the aim to simplify DNS programming in C. All low-level DNS/DNSSEC operations are supported. We also define a higher level API which allows a programmer to (for instance) create or sign packets.

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

Install ldns 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 ldns using dnf by running the following command:

sudo dnf -y install ldns

Install ldns 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 ldns using yum by running the following command:

sudo yum -y install ldns

How To Uninstall ldns on CentOS 8

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

sudo dnf remove ldns

ldns Package Contents on CentOS 8

/usr/lib/.build-id
/usr/lib/.build-id/c7
/usr/lib/.build-id/c7/45281380b4f5b1feb6b4e072ead74f2767b8d3
/usr/lib/libldns.so.2
/usr/lib/libldns.so.2.0.0
/usr/share/doc/ldns
/usr/share/doc/ldns/README
/usr/share/licenses/ldns
/usr/share/licenses/ldns/LICENSE
/usr/lib/.build-id
/usr/lib/.build-id/cf
/usr/lib/.build-id/cf/963da7b1a77d1ecda746f8c70505eb66b44733
/usr/lib64/libldns.so.2
/usr/lib64/libldns.so.2.0.0
/usr/share/doc/ldns
/usr/share/doc/ldns/README
/usr/share/licenses/ldns
/usr/share/licenses/ldns/LICENSE

References

Summary

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