PowerShell includes its own extensive, console-based help (similar to man pages in Unix /Linux shells) accessible via the Get-Help cmdlet.
The Get-Help cmdlet displays information about PowerShell concepts and commands, including cmdlets, functions, CIM commands, workflows, providers, aliases and scripts.
To get help for a PowerShell provider, type Get-Help followed by the provider name. For example, to get help for the Certificate provider, type Get-Help Certificate.
To get help for a cmdlet, type:
PS C:> Get-Help
To get online help, type:
PS C:> Get-Help -Online
For more information about the Get-Help cmdlet, type:
PS C:> Get-Help Get-Help -Online
The help is a function that runs Get-Help cmdlet internally and displays the result one page at a time.
The man is an alias for the help function.
Display basic information about a command
PS C:> Get-Help Format-Table
PS C:> Get-Help -Name Format-Table
Display basic information one page at a time
PS C:> Get-Help Format-Table | Out-Host -Paging
or
PS C:> help Format-Table
or
PS C:> man Format-Table
Display more information for a cmdlet
PS C:> Get-Help Format-Table -Detailed
PS C:> Get-Help Format-Table -Full
Display selected parts of a cmdlet by using parameters
PS C:> Get-Help Format-Table -Examples
PS C:> Get-Help Format-Table -Parameter GroupBy
PS C:> Get-Help Format-Table -Parameter *
Display available help topics
PS C:> Get-Help *
Display a list of conceptual topics
PS C:> Get-Help about_*