Hey there! Like Mike said, Instant Terminal would be my first choice to provide you with a "virtual Linux command line interface".
Also, Check out cloud shell which is now generally available in the Azure portal. The icon is just to the right of the search bar at the top and includes both Powershell and Azure-CLI. The great thing about cloud shell is that it includes all the packages you need and is already connected to your Azure account. You can even run this on your phone, it's so lightweight.
Give it a try here:
Run this Powershell command to see a list of all of your resources in Azure: