How To Install elmon on CentOS 8

elmon is Performance monitoring tool

Introduction

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

What is elmon

elmon is a performance monitoring tool for Linux. It provides an ncurses interface as well as the ability to save the data to a CSV file. elmon is based on nmon by Nigel Griffiths and the CSV output is compatible with nmon processing tools. elmon provides performance information on CPU, memory, network, disk, file system usage, etc. If you are familiar with nmon, here are the additional features that elmon supports o Multi-column output. o Interactive Help Menu o Stat sections are displayed in the order that the user enables them o Long term CPU graph will use up the entire width of the screen o Supports subsecond screen refreshes o New Memory/Swap graph o Multiple bug fixes (including several bug fixes supplied by David Baril on nmon forum).

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

Install elmon 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 elmon using dnf by running the following command:

sudo dnf -y install elmon

Install elmon 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 elmon using yum by running the following command:

sudo yum -y install elmon

How To Uninstall elmon on CentOS 8

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

sudo dnf remove elmon

elmon Package Contents on CentOS 8

/usr/bin/elmon
/usr/lib/.build-id
/usr/lib/.build-id/a8
/usr/lib/.build-id/a8/c899945ad62ba8c5ec0a51fae9f2380cdfc6ac
/usr/share/doc/elmon
/usr/share/doc/elmon/change_log.txt
/usr/share/licenses/elmon
/usr/share/licenses/elmon/license.txt

References

Summary

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