Get Unity VS Code Intellisense with Dotnet and Mono working

//Updated Commands get Unity and VS Code with Intellisense and Dotnet working

!!YOU NEED TO HAVE UBUNTU 20.04!!

!!THIS DOESNT GUIDE YOU THROUGH INSTALLATION OF VSCODE AND UNITY!!

//VS Code Settings
install "C#" extension
go to settings, untick "Omnisharp: Use Modern Net"

//Install Dotnet Ubuntu 20.04 Commands:
wget https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb
sudo apt update
sudo apt install apt-transport-https
sudo apt install dotnet-sdk-6.0
sudo apt update
sudo apt install apt-transport-https
sudo apt install dotnet-runtime-6.0

//check dotnet version:
dotnet --version

//Install Mono Ubuntu 20.04 Commands:
sudo apt install gnupg ca-certificates
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo "deb [arch=amd64] https://download.mono-project.com/repo/ubuntu vs-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-vs.list
sudo apt update
sudo apt install mono-devel

//Unity Engine Settings
Preferences->External tools->External Script Editor: Visual Studio code
Preferencse->External tools->Generate .csproj files for: ["Embedded packages", "Local packages", "Git packages", "Built-in packages"]

open a script, and wait ~1 minute as everything should load.
If not try Assets->Open C# Project