How To Install flann on CentOS 8

flann is Fast Library for Approximate Nearest Neighbors

Introduction

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

What is flann

FLANN is a library for performing fast approximate nearest neighbor searches in high dimensional spaces. It contains a collection of algorithms found to work best for nearest neighbor search and a system for automatically choosing the best algorithm and optimum parameters depending on the data sets.

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

Install flann 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 flann using dnf by running the following command:

sudo dnf -y install flann

Install flann 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 flann using yum by running the following command:

sudo yum -y install flann

How To Uninstall flann on CentOS 8

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

sudo dnf remove flann

flann Package Contents on CentOS 8

/usr/lib/.build-id
/usr/lib/.build-id/03
/usr/lib/.build-id/03/ce574feecc980402cad6101a2fa7a2c1f6ea74
/usr/lib/.build-id/f5
/usr/lib/.build-id/f5/951564e5862967f47440eedcb4f018cb690993
/usr/lib64/libflann.so.1.9
/usr/lib64/libflann.so.1.9.1
/usr/lib64/libflann_cpp.so.1.9
/usr/lib64/libflann_cpp.so.1.9.1
/usr/share/doc/flann
/usr/share/doc/flann/manual.pdf

References

Summary

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