How To Install Judy on CentOS 8

Judy is General purpose dynamic array

Introduction

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

What is Judy

Judy is a C library that provides a state-of-the-art core technology that implements a sparse dynamic array. Judy arrays are declared simply with a null pointer. A Judy array consumes memory only when it is populated, yet can grow to take advantage of all available memory if desired. Judy’s key benefits are scalability, high performance, and memory efficiency. A Judy array is extensible and can scale up to a very large number of elements, bounded only by machine memory. Since Judy is designed as an unbounded array, the size of a Judy array is not pre-allocated but grows and shrinks dynamically with the array population.

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

Install Judy 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 Judy using dnf by running the following command:

sudo dnf -y install Judy

Install Judy 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 Judy using yum by running the following command:

sudo yum -y install Judy

How To Uninstall Judy on CentOS 8

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

sudo dnf remove Judy

Judy Package Contents on CentOS 8

/usr/lib/.build-id
/usr/lib/.build-id/9f
/usr/lib/.build-id/9f/1fb26bcffbceef133f1e6ccf8920e509bb1dbe
/usr/lib64/libJudy.so.1
/usr/lib64/libJudy.so.1.0.3
/usr/share/doc/Judy
/usr/share/doc/Judy/AUTHORS
/usr/share/doc/Judy/ChangeLog
/usr/share/doc/Judy/README
/usr/share/doc/Judy/examples
/usr/share/doc/Judy/examples/Judy1Dup.c
/usr/share/doc/Judy/examples/Judy1Dup.h
/usr/share/doc/Judy/examples/Judy1DupCheck.c
/usr/share/doc/Judy/examples/Judy1Op.c
/usr/share/doc/Judy/examples/Judy1Op.h
/usr/share/doc/Judy/examples/Judy1OpCheck.c
/usr/share/doc/Judy/examples/Makefile
/usr/share/doc/Judy/examples/README
/usr/share/licenses/Judy
/usr/share/licenses/Judy/COPYING
/usr/lib/.build-id
/usr/lib/.build-id/a8
/usr/lib/.build-id/a8/17aa86b74580093af3f59ea43fcefa2be88832
/usr/lib64/libJudy.so.1
/usr/lib64/libJudy.so.1.0.3
/usr/share/doc/Judy
/usr/share/doc/Judy/AUTHORS
/usr/share/doc/Judy/ChangeLog
/usr/share/doc/Judy/README
/usr/share/doc/Judy/examples
/usr/share/doc/Judy/examples/Judy1Dup.c
/usr/share/doc/Judy/examples/Judy1Dup.h
/usr/share/doc/Judy/examples/Judy1DupCheck.c
/usr/share/doc/Judy/examples/Judy1Op.c
/usr/share/doc/Judy/examples/Judy1Op.h
/usr/share/doc/Judy/examples/Judy1OpCheck.c
/usr/share/doc/Judy/examples/Makefile
/usr/share/doc/Judy/examples/README
/usr/share/licenses/Judy
/usr/share/licenses/Judy/COPYING

References

Summary

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