Microsoft PowerShell Core now can be easily installed in Ubuntu 18.04, Ubuntu 16.04 via Snap package.

PowerShell is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and associated scripting language.

How to Install PowerShell in Ubuntu via Snap:

Snap packages are containerized applications that can be installed on many Linux distributions. Snap bundles its dependencies in a single package and updates itself automatically once new version is published.

To install PowerShell snap, open Ubuntu Software, search for and install PowerShell Core:

or open terminal (Ctrl+Alt+T) and install it by running command:

snap install powershell --classic

NOTE for Ubuntu 16.04 users first time installing a snap package, install snapd before getting started:

sudo apt install snapd snapd-xdg-open