How To Install Mono on Ubuntu 22.04 LTS

In this tutorial, we will show you how to install Mono on Ubuntu 22.04 LTS. For those of you who didn’t know, Mono is an open-source project that was developed by Xamarin (now owned by Microsoft) to provide a .NET framework-compatible set of tools for Linux, macOS, and other platforms. It allows developers to build and run .NET applications on non-Windows platforms. This includes support for .NET libraries and frameworks, such as ASP.NET and WPF.

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 Ubuntu 22.04 (Jammy Jellyfish). You can follow the same instructions for Ubuntu 22.04 and any other Debian-based distribution like Linux Mint, Elementary OS, Pop!_OS, and more as well.

Prerequisites

• A server running one of the following operating systems: Ubuntu 22.04, 20.04, and any other Debian-based distribution like Linux Mint.
• 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).
• An active internet connection. You’ll need an internet connection to download the necessary packages and dependencies for Mono.
• 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 Ubuntu 22.04 LTS Jammy Jellyfish

Step 1. First, make sure that all your system packages are up-to-date by running the following apt commands in the terminal.

sudo apt update
sudo apt upgrade
sudo apt install dirmngr gnupg apt-transport-https ca-certificates software-properties-common

Step 2. Installing Mono on Ubuntu 22.04.

By default, Mono is not available on Ubuntu 22.04 base repository. Now run the following command below to add the MonoDevelop repository to your Ubuntu system:

echo "deb https://download.mono-project.com/repo/ubuntu stable-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list

Next, import the GPG key using the following command:

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF

After the repository is enabled, now install the latest version of Mono using the below command:

sudo apt update
sudo apt install mono-devel

To verify that Mono has been installed successfully, enter the following command in your terminal window:

mono --version

Output:

Mono JIT compiler version 6.30.0.182 (tarball Fri Dec 16 16:36:00 UTC 2021)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           __thread
	SIGSEGV:       altstack
	Notifications: epoll
	Architecture:  x86
	Disabled:      none
	M

Congratulations! You have successfully installed Mono. Thanks for using this tutorial for installing Mono on Ubuntu 22.04 LTS Jammy Jellyfish system. For additional help or useful information, we recommend you check the official Mono website.