How to do it...

On CentOS 7.x, perform the following steps:

1. Register the Microsoft RPM repository: 

curl https://packages.microsoft.com/config/rhel/7/prod.repo | sudo tee /etc/yum.repos.d/microsoft.repo.

1. Install the package: sudo yum install -y powershell.
2. Run PowerShell by executing pwsh, which is now installed.

On Ubuntu 18.10, perform the following steps:

1. Open the Ubuntu Software store.
2. Search for powershell:

1. Install and run PowerShell Core:

The steps to install PowerShell on other distributions are fairly similar as long as you can use your distribution's package management system, such as rpm or dpkg.