Adding Mono Apt Repo for Debian

The Tip Show How-to Add the Mono Apt Repository for Debian GNU/Linux.

Mono is a Microsoft sponsored and Open Source implementation of Microsoft’s .NET Framework based on the ECMA standards for C# and the Common Language Runtime.

Finally, this Guide is Valid for All the Debian Based Distros like:

• Kali
• Deepin
• MX Linux
• antiX
• Parrot
• Netrunner
• Voyager Debian
• SparkyLinux
• MakuluLinux
• Elive Linux
• LMDE
• CrunchBang
• Parsix

1. How-to Quick-Start with Command Line on Debian:

   Console Debian QuickStart Guide

   Getting-Started with Command Line on Debian.

   First Update the Apt Repo Sources with:

   sudo apt update

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

2. Installing Requirements
   Simply play:

   sudo apt install gnupg ca-certificates apt-transport-https

3. Adding GPG Key
   Run:

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

4. Enabling the Mono Stable Apt Repository

   • 10+ Debian Setup
     Use this Setup also for Testing, Sid, and Kali:

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

   • 9 Debian Setup

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

   • 8 Debian Setup

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

5. Refreshing Apt Repositories

   sudo apt update