Adding Mono Apt Repo for Linux Mint

The Tip Show How-to Add the Mono Apt Repository for Linux Mint 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.

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

   Console Linux Mint QuickStart Guide

   Getting-Started with Command Line on Linux Mint.

   First Update the Apt Repo Sources with:

   sudo apt updateCopy

   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-httpsCopy

3. Adding GPG Key
   Run:

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

4. Enabling the Mono Stable Apt Repository

   • 20.x Linux Mint Setup

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

   • 19.x Linux Mint Setup

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

   • 18.x Linux Mint Setup

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

   • 17.x Linux Mint Setup

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

   • 13, 14, 15 & 16 Linux Mint Setup

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

5. Refreshing Apt Repositories

   sudo apt updateCopy