PowerShell 2.0 Get-Help -Online Parameter
One helpful new feature of PowerShell v 2.0 is the -Online parameter. As its name suggests, -Online enables us to get the latest support for a cmdlet direct from Microsoft’s website. The main purpose of this page is simply to explain how to get PowerShell’s -Online switch to work. My secondary aim is to present a case study on the frustration of learning a skill that is ostensibly simple but nevertheless slippery.
Syntax: Get-Help (Verb-Noun) -Online
When this technique works it’s like magic; issue the -Online command and be amazed to see the browser launch at a url such as:
http:// go.microsoft.com/fwlink/? LinkID=113322. The point is that if Microsoft ever amends the help file then the latest information will be there on the website, there will be no need for Microsoft to update PowerShell every time they edit a help file.
If the -Online switch worked for you straightaway, then read no further. However, if you are struggling with its syntax, then read on and I will explain the knack of using PowerShell’s -Online parameter.
Example to get online information about the Get-Service cmdlet
The secret of success is to start with the instruction ‘Get-Help’, or just plain ‘Help’ if you prefer. Next comes the name of the cmdlet that you want to research, and finally, the word -Online.
#PowerShell -Online parameter
Get-Help Get-Service -Online
While the above command works fine, however, this command below fails because I forgot to precede the cmdlet with Get-Help.
To double check your understanding try this:
You should see -Online listed among the parameters; for even more information append the -full parameter.
Next try this example:
There should be no sign of -Online amongst the parameters. However, you should see in the ‘Related Links’ at the bottom:
Online version: http://go.microsoft.com/fwlink/?LinkID=113332
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Guy’s Learning Frustration
My first mistake was to believe that -Online was a parameter supported by every PowerShell cmdlet, whereas in reality it’s only available with Get-Help.
My second problem was unfortunate; I used an early beta version of PowerShell 2.0. The Microsoft developers had not added the -Online parameter to this version, thus I had no chance of finding it! My stupidity here is not being more careful with beta software; how many more fingers will I burn before absorbing this lesson?
This saga of understanding -Online reminds me a pupil called DK, who I taught science. The reason that DK could not learn to read was merely because he did not know what the word ‘next’ meant. The English teacher would say. "David what’s this next word", pointing to ‘Cat’. David replied, "I don’t know". Once we discovered his learning block was the word ‘next’, DK’s education blossomed and he went on become a successful formula one mechanic.
PowerShell v 3.0 Update-Help
Starting with version 3, PowerShell provides an Update-Help cmdlet to automatically refresh the help files. See more about Update-Help.
In this instance, it was Marco Shaw at the Microsoft TechNet forum who patiently explained to me how to get the -Online parameter to work. And there is another good forum at microsoft.public.windows.powershell. Without seeming ungrateful, my plea is that wherever possible technical forums should amalgamate. While I prize diversity in the food and beer industries, I would welcome centralization is the case of PowerShell forums.
Summary of PowerShell 2.0’s -Online Parameter
Just remember that the -Online technique for getting extra help is a parameter of Get-Help. For all other cmdlets your best chance of finding the most relevant url is to look in the ‘Related Links’.
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Please email me if you have a better example script. Also please report any factual mistakes, grammatical errors or broken links, I will be happy to correct the fault.