pcgeek86 · November 10, 2025 13:48 · gitma1r1 · Dec 7, 2022 · AkbarAli-Duet · Jan 29, 2023
diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
 Get-Command                                               # Retrieves a list of all the commands available to PowerShell
                                                          # (native binaries in $env:PATH + cmdlets / functions from PowerShell modules)

 Get-Help                                                  # Get all help topics
 Get-Help -Name about_Variables                            # Get help for a specific about_* topic (aka. man page)
 Get-Help -Name Get-Command                                # Get help for a specific PowerShell function
 Get-Help -Name Get-Command -Parameter Module              # Get help for a specific parameter on a specific command

 ###################################################
 # Flow Control Statements
 ###################################################

 if (1 -eq 1) { }                                          # Do something if 1 is equal to 1

 do { 'hi' } while ($false)                                # Loop while a condition is true (always executes at least once)

 while ($false) { 'hi' }                                   # While loops are not guaranteed to run at least once
 while ($true) { }                                         # Do something indefinitely
 while ($true) { if (1 -eq 1) { break } }                  # Break out of an infinite while loop conditionally

 for ($i = 0; $i -le 10; $i++) { Write-Host $i }           # Iterate using a for..loop
 foreach ($item in (Get-Process)) { }                      # Iterate over items in an array

 ###################################################
 # Variables
 ###################################################


 $a = 0                                                    # Initialize a variable
 [int] $a = 'Trevor'                                       # Initialize a variable, with the specified type (throws an exception)
 [string] $a = 'Trevor'                                    # Initialize a variable, with the specified type (doesn't throw an exception)

 Get-Command -Name *varia*                                 # Get a list of commands related to variable management

 Get-Variable                                              # Get an array of objects, representing the variables in the current and parent scopes 
 Get-Variable | ? { $PSItem.Options -contains 'constant' } # Get variables with the "Constant" option set
 Get-Variable | ? { $PSItem.Options -contains 'readonly' } # Get variables with the "ReadOnly" option set

 New-Variable -Name FirstName -Value Trevor
 New-Variable FirstName -Value Trevor -Option Constant     # Create a constant variable, that can only be removed by restarting PowerShell
 New-Variable FirstName -Value Trevor -Option ReadOnly     # Create a variable that can only be removed by specifying the -Force parameter on Remove-Variable

 Remove-Variable -Name firstname                           # Remove a variable, with the specified name
 Remove-Variable -Name firstname -Force                    # Remove a variable, with the specified name, that has the "ReadOnly" option set

 ###################################################
 # Functions
 ###################################################

 # A PowerShell Advanced Function, with all three blocks declared: BEGIN, PROCESS, END
 function Do-Something {
  [CmdletBinding]()]
  param ()
  begin { }
  process { }
  end { }
 }

 ###################################################
 # Working with Modules
 ###################################################

 Get-Command -Name *module* -Module mic*core                 # Which commands can I use to work with modules?

 Get-Module -ListAvailable                                   # Show me all of the modules installed on my system (controlled by $env:PSModulePath)
 Get-Module                                                  # Show me all of the modules imported into the current session

 $PSModuleAutoLoadingPreference = 0                          # Disable auto-loading of installed PowerShell modules, when a command is invoked

 Import-Module -Name NameIT                                  # Explicitly import a module, from the specified filesystem path or name (must be present in $env:PSModulePath)
 Remove-Module -Name NameIT                                  # Remove a module from the scope of the current PowerShell session

 New-ModuleManifest                                          # Helper function to create a new module manifest. You can create it by hand instead.

 New-Module -Name trevor -ScriptBlock {                      # Create an in-memory PowerShell module (advanced users)
  function Add($a,$b) { $a + $b } }

 New-Module -Name trevor -ScriptBlock {                      # Create an in-memory PowerShell module, and make it visible to Get-Module (advanced users)
  function Add($a,$b) { $a + $b } } | Import-Module

 ###################################################
 # Module Management
 ###################################################

 Get-Command -Module PowerShellGet                           # Explore commands to manage PowerShell modules

 Find-Module -Tag cloud                                      # Find modules in the PowerShell Gallery with a "cloud" tag
 Find-Module -Name ps*                                       # Find modules in the PowerShell Gallery whose name starts with "PS"

 Install-Module -Name NameIT -Scope CurrentUser -Force       # Install a module to your personal directory (non-admin)
 Install-Module -Name NameIT -Force                          # Install a module to your personal directory (admin / root)
 Install-Module -Name NameIT -RequiredVersion 1.9.0          # Install a specific version of a module

 Uninstall-Module -Name NameIT                               # Uninstall module called "NameIT", only if it was installed via Install-Module

 Register-PSRepository -Name <repo> -SourceLocation <uri>    # Configure a private PowerShell module registry
 Unregister-PSRepository -Name <repo> -SourceLocation uri    # Deregister a PowerShell Repository
	Get-Command # Retrieves a list of all the commands available to PowerShell
	# (native binaries in $env:PATH + cmdlets / functions from PowerShell modules)

	Get-Help # Get all help topics
	Get-Help -Name about_Variables # Get help for a specific about_* topic (aka. man page)
	Get-Help -Name Get-Command # Get help for a specific PowerShell function
	Get-Help -Name Get-Command -Parameter Module # Get help for a specific parameter on a specific command

	###################################################
	# Flow Control Statements
	###################################################

	if (1 -eq 1) { } # Do something if 1 is equal to 1

	do { 'hi' } while ($false) # Loop while a condition is true (always executes at least once)

	while ($false) { 'hi' } # While loops are not guaranteed to run at least once
	while ($true) { } # Do something indefinitely
	while ($true) { if (1 -eq 1) { break } } # Break out of an infinite while loop conditionally

	for ($i = 0; $i -le 10; $i++) { Write-Host $i } # Iterate using a for..loop
	foreach ($item in (Get-Process)) { } # Iterate over items in an array

	###################################################
	# Variables
	###################################################


	$a = 0 # Initialize a variable
	[int] $a = 'Trevor' # Initialize a variable, with the specified type (throws an exception)
	[string] $a = 'Trevor' # Initialize a variable, with the specified type (doesn't throw an exception)

	Get-Command -Name varia # Get a list of commands related to variable management

	Get-Variable # Get an array of objects, representing the variables in the current and parent scopes
	Get-Variable \| ? { $PSItem.Options -contains 'constant' } # Get variables with the "Constant" option set
	Get-Variable \| ? { $PSItem.Options -contains 'readonly' } # Get variables with the "ReadOnly" option set

	New-Variable -Name FirstName -Value Trevor
	New-Variable FirstName -Value Trevor -Option Constant # Create a constant variable, that can only be removed by restarting PowerShell
	New-Variable FirstName -Value Trevor -Option ReadOnly # Create a variable that can only be removed by specifying the -Force parameter on Remove-Variable

	Remove-Variable -Name firstname # Remove a variable, with the specified name
	Remove-Variable -Name firstname -Force # Remove a variable, with the specified name, that has the "ReadOnly" option set

	###################################################
	# Functions
	###################################################

	# A PowerShell Advanced Function, with all three blocks declared: BEGIN, PROCESS, END
	function Do-Something {
	[CmdletBinding]()]
	param ()
	begin { }
	process { }
	end { }
	}

	###################################################
	# Working with Modules
	###################################################

	Get-Command -Name module -Module mic*core # Which commands can I use to work with modules?

	Get-Module -ListAvailable # Show me all of the modules installed on my system (controlled by $env:PSModulePath)
	Get-Module # Show me all of the modules imported into the current session

	$PSModuleAutoLoadingPreference = 0 # Disable auto-loading of installed PowerShell modules, when a command is invoked

	Import-Module -Name NameIT # Explicitly import a module, from the specified filesystem path or name (must be present in $env:PSModulePath)
	Remove-Module -Name NameIT # Remove a module from the scope of the current PowerShell session

	New-ModuleManifest # Helper function to create a new module manifest. You can create it by hand instead.

	New-Module -Name trevor -ScriptBlock { # Create an in-memory PowerShell module (advanced users)
	function Add($a,$b) { $a + $b } }

	New-Module -Name trevor -ScriptBlock { # Create an in-memory PowerShell module, and make it visible to Get-Module (advanced users)
	function Add($a,$b) { $a + $b } } \| Import-Module

	###################################################
	# Module Management
	###################################################

	Get-Command -Module PowerShellGet # Explore commands to manage PowerShell modules

	Find-Module -Tag cloud # Find modules in the PowerShell Gallery with a "cloud" tag
	Find-Module -Name ps* # Find modules in the PowerShell Gallery whose name starts with "PS"

	Install-Module -Name NameIT -Scope CurrentUser -Force # Install a module to your personal directory (non-admin)
	Install-Module -Name NameIT -Force # Install a module to your personal directory (admin / root)
	Install-Module -Name NameIT -RequiredVersion 1.9.0 # Install a specific version of a module

	Uninstall-Module -Name NameIT # Uninstall module called "NameIT", only if it was installed via Install-Module

	Register-PSRepository -Name <repo> -SourceLocation <uri> # Configure a private PowerShell module registry
	Unregister-PSRepository -Name <repo> -SourceLocation uri # Deregister a PowerShell Repository
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