My friend is testing PowerShell on Linux, I was able to install the ImportExcel using the Install-Module cmdlet.
Is there any support for Microsoft Online Services on it?
We found a MSOnline module, but it didn't work.
haven't tried myself, but give it a try to the AzureAD module, you can install it from PowerShell gallery using Install-Module -Name AzureAD
In most command just replace Msonline with the AzureAD command prefix.
let me know how it goes