This e-book is intended as a 'Quick Start' guide to PowerShell for people who already know Bash or one of the other Unix shells.
The book has 3 elements:
an introductory chapter which covers some PowerShell concepts
a summary list of PowerShell equivalents of Unix commands in one e-book chapter
a detailed discussion of Powershell equivalents of Unix commands, organised in the alphabetical order of the unix command