Difference between revisions of "Power Shell"

<source lang="powershell"> get-host | select version </source>.

However, if you might have installed something other than the normal RTM or GA release version you'll need to the registry key <code>HKLM\Software\Microsoft\PowerShell\1</code>, which will have the following values of interest...

! Value                !! Data                                !! Meaning

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== Useful One-Liners ==

! Command              !! Description  

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'''Data types'''

! Notation                      !! Data Type

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=== Escape Characters ===

!  Text              !! Description

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Useful formatting examples...

! uFormat Specifier                            !! Example

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Useful formatting examples...

! ToString Method Specifier          !! UK-Centric Example Output

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=== Macros / Built-in Variables ===

! Variable                !! Description

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== Conditional Operators ==

== Comparison ==

!  Operator          !! Description

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=== Logic ===

!  Operator            !! Description

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To control how a script behaves as a result of an exception, modify the <code> $ErrorActionPreference </code> variable, if required.  '''In the default continue mode, an error will output to the screen, then the script will continue.  By outputting the error to the screen PowerShell CmdLets consider the exception to have been handled!  If you want the opportunity to <code>catch</code> or <code>trap</code> you must append <code>-ErrorAction:Stop</code> to the CmdLet you expect might fail.'''

! Value            !! Effect

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Provides a list of recent errors experienced - which can be invaluable for properly identifying and investigating errors.  The object is the same as found in a pipeline when an exception has occurred.

! Property                                    !! Description                              !! Example (VC login error)

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