How To Install ledmon on CentOS 8

ledmon is Enclosure LED Utilities

Introduction

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

What is `ledmon`

The ledmon and ledctl are user space applications design to control LED associated with each slot in an enclosure or a drive bay. There are two types of system (Activity LED, Locate LED, Fail LED). User must have root privileges to use this application.

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

Install ledmon 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 ledmon using dnf by running the following command:

sudo dnf -y install ledmon

Install ledmon 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 ledmon using yum by running the following command:

sudo yum -y install ledmon

How To Uninstall ledmon on CentOS 8

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

sudo dnf remove ledmon

ledmon Package Contents on CentOS 8

/usr/lib/.build-id
/usr/lib/.build-id/38
/usr/lib/.build-id/38/b3c0a90d7a5056cd55109fdfe07dbb7d8ab1ed
/usr/lib/.build-id/5f
/usr/lib/.build-id/5f/dc959615d237c2e2b5b1160ac5cc6d1fc9a1e1
/usr/lib/systemd/system/ledmon.service
/usr/sbin/ledctl
/usr/sbin/ledmon
/usr/share/doc/ledmon
/usr/share/doc/ledmon/COPYING
/usr/share/doc/ledmon/README.md
/usr/share/man/man5/ledmon.conf.5.gz
/usr/share/man/man8/ledctl.8.gz
/usr/share/man/man8/ledmon.8.gz

References

ledmon website

Summary

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