osm1n · June 10, 2021 15:40 · Dec 12, 2020 · Dec 12, 2020 · Sep 29, 2020 · Aug 18, 2020
diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -192,11 +192,18 @@ Get-CimInstance -Namespace root -ClassName __NAMESPACE      # Explore the child
 # Asynchronous Event Registration
 ###################################################
 
+#### Register for filesystem events
 $Watcher = [System.IO.FileSystemWatcher]::new('c:\tmp')
 Register-ObjectEvent -InputObject $Watcher -EventName Created -Action {
   Write-Host -Object 'New file created!!!'
-}                                                           # Register for filesystem events
+}                                                           
 
+#### Perform a task on a timer (ie. every 5000 milliseconds)
+$Timer = [System.Timers.Timer]::new(5000)
+Register-ObjectEvent -InputObject $Timer -EventName Elapsed -Action {
+  Write-Host -ForegroundColor Blue -Object 'Timer elapsed! Doing some work.'
+}
+$Timer.Start()
 
 ###################################################
 # PowerShell Drives (PSDrives)

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -187,6 +187,7 @@ Get-CimClass -Namespace root\cimv2                          # Explore the variou
 Get-CimInstance -Namespace root -ClassName __NAMESPACE      # Explore the child WMI namespaces underneath the root\cimv2 namespace
 
 
+
 ###################################################
 # Asynchronous Event Registration
 ###################################################
@@ -196,3 +197,22 @@ Register-ObjectEvent -InputObject $Watcher -EventName Created -Action {
   Write-Host -Object 'New file created!!!'
 }                                                           # Register for filesystem events
 
+
+###################################################
+# PowerShell Drives (PSDrives)
+###################################################
+
+Get-PSDrive                                                 # List all the PSDrives on the system
+New-PSDrive -Name videos -PSProvider Filesystem -Root x:\data\content\videos  # Create a new PSDrive that points to a filesystem location
+New-PSDrive -Name h -PSProvider FileSystem -Root '\\storage\h$\data' -Persist # Create a persistent mount on a drive letter, visible in Windows Explorer
+Set-Location -Path videos:                                  # Switch into PSDrive context
+Remove-PSDrive -Name xyz                                    # Delete a PSDrive
+
+###################################################
+# Data Management
+###################################################
+
+Get-Process | Group-Object -Property Name                   # Group objects by property name
+Get-Process | Sort-Object -Property Id                      # Sort objects by a given property name
+Get-Process | Where-Object -FilterScript { $PSItem.Name -match '^c' } # Filter objects based on a property matching a value
+gps | where Name -match '^c'                                # Abbreviated form of the previous statement
diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -186,3 +186,13 @@ Get-CimInstance -ClassName Win32_VideoController            # Retrieve informati
 Get-CimClass -Namespace root\cimv2                          # Explore the various WMI classes available in the root\cimv2 namespace
 Get-CimInstance -Namespace root -ClassName __NAMESPACE      # Explore the child WMI namespaces underneath the root\cimv2 namespace
 
+
+###################################################
+# Asynchronous Event Registration
+###################################################
+
+$Watcher = [System.IO.FileSystemWatcher]::new('c:\tmp')
+Register-ObjectEvent -InputObject $Watcher -EventName Created -Action {
+  Write-Host -Object 'New file created!!!'
+}                                                           # Register for filesystem events
+
diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -26,7 +26,7 @@ $FirstName = 'Trevor'
 $FirstName -like 'T*'                                     # Perform string comparison using the -like operator, which supports the wildcard (*) character. Returns $true
 
 $BaconIsYummy = $true
-$FoodToEat = $BaconIsYummy ? 'bacon' : 'beets'            # Sets the $FoodToEat variable to 'bacon'
+$FoodToEat = $BaconIsYummy ? 'bacon' : 'beets'            # Sets the $FoodToEat variable to 'bacon' using the ternary operator
 
 ###################################################
 # Regular Expressions

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -25,6 +25,9 @@ $a -lt 3                                                  # Less than comparison
 $FirstName = 'Trevor'
 $FirstName -like 'T*'                                     # Perform string comparison using the -like operator, which supports the wildcard (*) character. Returns $true
 
+$BaconIsYummy = $true
+$FoodToEat = $BaconIsYummy ? 'bacon' : 'beets'            # Sets the $FoodToEat variable to 'bacon'
+
 ###################################################
 # Regular Expressions
 ###################################################
@@ -152,6 +155,24 @@ Set-Content -Path c:\test.txt -Value ''                     # Create an empty fi
 Remove-Item -Path testing.txt                               # Delete a file
 [System.IO.File]::Delete('testing.txt')                     # Delete a file using .NET Base Class Library
 
+###################################################
+# Hashtables (Dictionary)
+###################################################
+
+$Person = @{
+  FirstName = 'Trevor'
+  LastName = 'Sullivan'
+  Likes = @(
+    'Bacon',
+    'Beer',
+    'Software'
+  )
+}                                                           # Create a PowerShell HashTable
+
+$Person.FirstName                                           # Retrieve an item from a HashTable
+$Person.Likes[-1]                                           # Returns the last item in the "Likes" array, in the $Person HashTable (software)
+$Person.Age = 50                                            # Add a new property to a HashTable
+
 ###################################################
 # Windows Management Instrumentation (WMI) (Windows only)
 ###################################################

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -34,6 +34,9 @@ $matches[0]                                               # Returns 'Trevor', ba
 
 @('Trevor', 'Billy', 'Bobby') -match '^B'                 # Perform a regular expression match against an array of string values. Returns Billy, Bobby
 
+$regex = [regex]'(\w{3,8})'
+$regex.Matches('Trevor Bobby Dillon Joe Jacob').Value     # Find multiple matches against a singleton string value.
+
 ###################################################
 # Flow Control
 ###################################################

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -23,7 +23,7 @@ $a -gt 2                                                  # Greater than compari
 $a -lt 3                                                  # Less than comparison operator
 
 $FirstName = 'Trevor'
-$FirstName -like 'T*'                                     # Use the -like operator, which supports the wildcard (*) character. Returns $true
+$FirstName -like 'T*'                                     # Perform string comparison using the -like operator, which supports the wildcard (*) character. Returns $true
 
 ###################################################
 # Regular Expressions

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -29,6 +29,10 @@ $FirstName -like 'T*'                                     # Use the -like operat
 # Regular Expressions
 ###################################################
 
+'Trevor' -match '^T\w*'                                   # Perform a regular expression match against a string value. # Returns $true and populates $matches variable
+$matches[0]                                               # Returns 'Trevor', based on the above match
+
+@('Trevor', 'Billy', 'Bobby') -match '^B'                 # Perform a regular expression match against an array of string values. Returns Billy, Bobby
 
 ###################################################
 # Flow Control

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -15,12 +15,21 @@ Get-Help -Name Get-Command -Parameter Module              # Get help for a speci
 
 $a = 2                                                    # Basic variable assignment operator
 $a += 1                                                   # Incremental assignment operator
+$a -= 1                                                   # Decrement assignment operator
 
 $a -eq 0                                                  # Equality comparison operator
 $a -ne 5                                                  # Not-equal comparison operator
 $a -gt 2                                                  # Greater than comparison operator
 $a -lt 3                                                  # Less than comparison operator
 
+$FirstName = 'Trevor'
+$FirstName -like 'T*'                                     # Use the -like operator, which supports the wildcard (*) character. Returns $true
+
+###################################################
+# Regular Expressions
+###################################################
+
+
 ###################################################
 # Flow Control
 ###################################################

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -143,6 +143,8 @@ Remove-Item -Path testing.txt                               # Delete a file
 Get-CimInstance -ClassName Win32_BIOS                       # Retrieve BIOS information
 Get-CimInstance -ClassName Win32_DiskDrive                  # Retrieve information about locally connected physical disk devices
 Get-CimInstance -ClassName Win32_PhysicalMemory             # Retrieve information about install physical memory (RAM)
+Get-CimInstance -ClassName Win32_NetworkAdapter             # Retrieve information about installed network adapters (physical + virtual)
+Get-CimInstance -ClassName Win32_VideoController            # Retrieve information about installed graphics / video card (GPU)
 
 Get-CimClass -Namespace root\cimv2                          # Explore the various WMI classes available in the root\cimv2 namespace
 Get-CimInstance -Namespace root -ClassName __NAMESPACE      # Explore the child WMI namespaces underneath the root\cimv2 namespace

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -119,7 +119,7 @@ Install-Module -Name NameIT -RequiredVersion 1.9.0          # Install a specific
 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
+Unregister-PSRepository -Name <repo>                        # Deregister a PowerShell Repository
 
 
 ###################################################

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -135,3 +135,15 @@ Set-Content -Path c:\test.txt -Value ''                     # Create an empty fi
 
 Remove-Item -Path testing.txt                               # Delete a file
 [System.IO.File]::Delete('testing.txt')                     # Delete a file using .NET Base Class Library
+
+###################################################
+# Windows Management Instrumentation (WMI) (Windows only)
+###################################################
+
+Get-CimInstance -ClassName Win32_BIOS                       # Retrieve BIOS information
+Get-CimInstance -ClassName Win32_DiskDrive                  # Retrieve information about locally connected physical disk devices
+Get-CimInstance -ClassName Win32_PhysicalMemory             # Retrieve information about install physical memory (RAM)
+
+Get-CimClass -Namespace root\cimv2                          # Explore the various WMI classes available in the root\cimv2 namespace
+Get-CimInstance -Namespace root -ClassName __NAMESPACE      # Explore the child WMI namespaces underneath the root\cimv2 namespace
+
diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -119,4 +119,19 @@ Install-Module -Name NameIT -RequiredVersion 1.9.0          # Install a specific
 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
+Unregister-PSRepository -Name <repo> -SourceLocation uri    # Deregister a PowerShell Repository
+
+
+###################################################
+# Filesystem
+###################################################
+
+New-Item -Path c:\test -ItemType Directory                  # Create a directory
+mkdir c:\test2                                              # Create a directory (short-hand)
+
+New-Item -Path c:\test\myrecipes.txt                        # Create an empty file
+Set-Content -Path c:\test.txt -Value ''                     # Create an empty file
+[System.IO.File]::WriteAllText('testing.txt', '')           # Create an empty file using .NET Base Class Library
+
+Remove-Item -Path testing.txt                               # Delete a file
+[System.IO.File]::Delete('testing.txt')                     # Delete a file using .NET Base Class Library
diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -8,8 +8,21 @@ Get-Help -Name about_Variables                            # Get help for a speci
 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
 
+
+###################################################
+# Operators
+###################################################
+
+$a = 2                                                    # Basic variable assignment operator
+$a += 1                                                   # Incremental assignment operator
+
+$a -eq 0                                                  # Equality comparison operator
+$a -ne 5                                                  # Not-equal comparison operator
+$a -gt 2                                                  # Greater than comparison operator
+$a -lt 3                                                  # Less than comparison operator
+
 ###################################################
-# Flow Control Statements
+# Flow Control
 ###################################################
 
 if (1 -eq 1) { }                                          # Do something if 1 is equal to 1

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -58,8 +58,9 @@ Remove-Variable -Name firstname -Force                    # Remove a variable, w
 # Functions
 ###################################################
 
-# A PowerShell Advanced Function, with all three blocks declared: BEGIN, PROCESS, END
-function Do-Something {
+function add ($a, $b) { $a + $b }                         # A basic PowerShell function
+
+function Do-Something {                                   # A PowerShell Advanced Function, with all three blocks declared: BEGIN, PROCESS, END
   [CmdletBinding]()]
   param ()
   begin { }

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -23,6 +23,15 @@ while ($true) { if (1 -eq 1) { break } }                  # Break out of an infi
 for ($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
 
+switch ('test') { 'test' { 'matched'; break } }           # Use the switch statement to perform actions based on conditions. Returns string 'matched'
+switch -regex (@('Trevor', 'Daniel', 'Bobby')) {          # Use the switch statement with regular expressions to match inputs
+  'o' { $PSItem; break }                                  # NOTE: $PSItem or $_ refers to the "current" item being matched in the array
+}
+switch -regex (@('Trevor', 'Daniel', 'Bobby')) {          # Switch statement omitting the break statement. Inputs can be matched multiple times, in this scenario.
+  'e' { $PSItem }
+  'r' { $PSItem }
+}
+
 ###################################################
 # Variables
 ###################################################

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -1,5 +1,7 @@
 Get-Command                                               # Retrieves a list of all the commands available to PowerShell
                                                           # (native binaries in $env:PATH + cmdlets / functions from PowerShell modules)
+Get-Command -Module Microsoft*                            # Retrieves a list of all the PowerShell commands exported from modules named Microsoft*
+Get-Command -Name *item                                   # Retrieves a list of all commands (native binaries + PowerShell commands) ending in "item"
 
 Get-Help                                                  # Get all help topics
 Get-Help -Name about_Variables                            # Get help for a specific about_* topic (aka. man page)

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -65,6 +65,8 @@ Get-Command -Name *module* -Module mic*core                 # Which commands can
 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
 

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -65,8 +65,8 @@ Get-Command -Name *module* -Module mic*core                 # Which commands can
 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
 
-Import-Module                                               # Explicitly import a module, from the specified filesystem path or name (must be present in $env:PSModulePath)
-Remove-Module                                               # Remove a module from the scope of the current PowerShell session
+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.
 

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -1,5 +1,10 @@
-Get-Command
-Get-Help
+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

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -1,3 +1,5 @@
+Get-Command
+Get-Help
 
 ###################################################
 # Flow Control Statements
@@ -50,7 +52,27 @@ function Do-Something {
 }
 
 ###################################################
-# Modules
+# 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
+
+Import-Module                                               # Explicitly import a module, from the specified filesystem path or name (must be present in $env:PSModulePath)
+Remove-Module                                               # Remove a module from the scope of the current PowerShell session
+
+New-ModuleManifest                                          # Helper function to create a new module manifest. You can create it by hand instead.
+
+New-Module -Name trevor -ScriptBlock {                      # Create an in-memory PowerShell module (advanced users)
+  function Add($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

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -1,10 +1,19 @@
 
 ###################################################
-# Conditional Statements
+# 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
 ###################################################

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -51,7 +51,9 @@ Find-Module -Name ps*                                       # Find modules in th
 
 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 PowerShell Gallery
+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
+Register-PSRepository -Name <repo> -SourceLocation <uri>    # Configure a private PowerShell module registry
+Unregister-PSRepository -Name <repo> -SourceLocation uri    # Deregister a PowerShell Repository
diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -5,13 +5,15 @@
 
 if (1 -eq 1) { }                                          # Do something if 1 is equal to 1
 
-$a = 0
-
-
 ###################################################
 # 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 

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -12,14 +12,18 @@ $a = 0
 # Variables
 ###################################################
 
+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 scope
+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

diff --git a/cheatsheet.ps1 b/cheatsheet.ps1
@@ -0,0 +1,51 @@
+
+###################################################
+# Conditional Statements
+###################################################
+
+if (1 -eq 1) { }                                          # Do something if 1 is equal to 1
+
+$a = 0
+
+
+###################################################
+# Variables
+###################################################
+
+
+Get-Variable                                              # Get an array of objects, representing the variables in the current scope
+
+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
+
+###################################################
+# Functions
+###################################################
+
+# A PowerShell Advanced Function, with all three blocks declared: BEGIN, PROCESS, END
+function Do-Something {
+  [CmdletBinding]()]
+  param ()
+  begin { }
+  process { }
+  end { }
+}
+
+###################################################
+# Modules
+###################################################
+
+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)
+
+Uninstall-Module -Name NameIT                               # Uninstall module called "NameIT", only if it was installed via PowerShell Gallery
+
+Register-PSRepository -Name <repo> -SourceLocation <uri>    # Configure a private PowerShell module registry