In this tutorial, we will show you how to install Mono on CentOS 8. For those of you who didn’t know, Mono is an open-source platform for developing and running cross-platform applications based on the ECMA/ISO Standards. It is a free and open-source implementation of Microsoft’s .NET framework.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of Mono on a CentOS 8 server.

Prerequisites

• A server running one of the following operating systems: CentOS 8.
• It’s recommended that you use a fresh OS install to prevent any potential issues.
• SSH access to the server (or just open Terminal if you’re on a desktop).
• A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install Mono on CentOS 8

Step 1. First, let’s start by ensuring your system is up-to-date.

sudo dnf install epel-release
sudo dnf update

Step 2. Installing Mono on CentOS 8.

Now, we import the Mono repository’s GPG key using the following command:

sudo rpm --import 'http://pool.sks-keyservers.net/pks/lookup?op=get&search=0x3fa7e0328081bff6a14da29aa6a19b38d3d831ef'

Next, add the Mono repository to your system:

sudo dnf config-manager --add-repo https://download.mono-project.com/repo/centos8-stable.repo

Then, run the following commands to install Mono:

sudo dnf install mono-complete

Once installed, to verify if Mono is installed, run the commands below:

$ mono --version

Mono JIT compiler version 6.8.1.109 (tarball Tue Feb  28 13:36:50 UTC 2020)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
    TLS:           __thread
    SIGSEGV:       altstack
    Notifications: epoll
    Architecture:  amd64
    Disabled:      none
    Misc:          softdebug 
    Interpreter:   yes
    LLVM:          yes(810)
    Suspend:       hybrid
    GC:            sgen (concurrent by default)

Congratulations! You have successfully installed Mono. Thanks for using this tutorial for installing Mono on CentOS 8 systems. For additional help or useful information, we recommend you check the official Mono website.