Como habilitar dotnet sdk no linux ubuntu:

sudo snap install dotnet-sdk --classic --channel=6.0

depois

sudo snap alias dotnet-sdk.dotnet dotnet

pode instalar também o dotnet runtime

sudo snap alias dotnet-runtime-60.dotnet dotnet

 Como instalar Powershell no Linux Ubuntu (from Microsoft):

• PowerShell 7.2.1 (pacote universal) para qualquer versão de suporte do Ubuntu
  • https://github.com/PowerShell/PowerShell/releases/download/v7.2.1/powershell-lts_7.2.1-1.deb_amd64.deb
  • # Install the downloaded package sudo dpkg -i powershell-lts_7.2.1-1.deb_amd64.deb
  • # Resolve missing dependencies and finish the install (if necessary) sudo apt-get install -f

# Start PowerShell pwsh

How to install Grub Customizer on Ubuntu or Linux Mint

sudo add-apt-repository ppa:danielrichter2007/grub-customizer -y

# getting new info of this new repo

sudo apt-get -y update

# installing

sudo apt-get install -y grub-customizer

# repo for grub-customizer