What is PowerShell?
PowerShell is a cross-platform task automation solution made up of a command-line shell, a scripting language, and a configuration management framework. PowerShell runs on Windows, Linux, and macOS. -https://docs.microsoft.com/en-us/powershell/scripting/overview
Source: https://docs.microsoft.com/en-us/powershell/scripting/install/install-debian