Microsoft now expects us to have a working knowledge of PowerShell for all their admin certifications. They don't necessarily expect an extensive command of the shell, but at least a working knowledge.
PowerShell guru Don Jones puts it this way, "If you think certifications were a key to your getting and maintaining your job, then make no mistake: PowerShell is even more crucial. Ignore it at your peril."
But this prediction of his is just downright scary, "Learn PowerShell or learn to say, 'Would you like fries with that?'"
If you want to learn PowerShell, but prefer an online resource instead of a book, then I've found an excellent tutorial on the
powershell.com website. It's called
Mastering PowerShell by Dr. Tobias Weltner, and it's a training course divided into 20 short tutorials, starting with the basics.
I hope you find this resource useful on your way to PowerShell mastery.