FINDING CMDLETS AND HELP USEFUL CMDLETS LOOPS & BRANCHES
Get-Command List available commands. Use -Module, -Noun, How To… Commands Loop/Branch How To Use
-Verb. Wildcards help too Zip Files Compress-Archive, Expand-Archive If/Then If ($true) { <this> }
Get-Member List properties and methods of an object Date/Time Get-Date, Set-Date, Get-TimeZone, Set-TimeZone If/Then/Else If ($true) { <this> } else { <that> }
Get-Help Help for a command. Use -Online to get latest Event Logs Get-WinEvent, New-WinEvent For For ($a=0; $a -lt 10; $a++) { <this> }
Performance Get-Counter, Export-Counter, Import-Counter Do…While Do { <this> } While ($evaluation)
Clipboard Get-Clipboard, Set-Clipboard Do…Until Do { <this> } Until ($evaluation)
PIPELINE & OBJECTS Reboot Restart-Computer While While ($evaluation) { <this> }
Send Output Out-Printer, Out-Gridview, Out-File Foreach Foreach ($a in $b) { <this $a> }
Common pattern: Get | Filter/Group/Sort | Modify/Delete/Output/Convert User Input Read-Host Switch Switch ($a) {
Use Jobs Start-Job, Stop-Job, Get-Job, Receive-Job, Remove-Job “one” { <this happens if $a is “one”> }
Where-Object Filters objects based on value of property Wait Start-Sleep “two” { <this happens if $a is “two”> }
Select-Object Choose properties of an object to include in Map Drives Get-PSDrive, New-PSDrive, Remove-PSDrive Default { <this $a is none of above>}
pipeline Navigate Get-Location, Set-Location, Test-Path }
Group-Object Group based on property values File/Folders New-Item, Get-Item, Get-ChildItem,
Sort-Object Sort results by property values Get-Content, Set-Content
Foreach-Object Act on each object in pipeline Move-Item, Rename-Item, Copy-Item, Remove-Item ARRAYS
Measure-Object Measure property values or number of objects
How To… Commands
COMMON PARAMETERS Create Array $a = @()
BUILT-IN VARIABLES Single Item Array $a = @(“one”)
-WHATIF Don’t make the changes, but output what would Item Reference $a[index] (0 is first)
$Args Arguments passed into script. -CONFIRM Prompt before making changes Range Reference $a[0..4] (Returns first 5)
$error Array of errors. $Error[0] is latest. -VERBOSE Display verbose output Last Item Reference $a[-1]
$host Details on application running PS -DEBUG Display debug-level output
$IsLinux Returns TRUE on Linux OS -ERRORACTION Override $ErrorActionPreference variable
-OUTVARIABLE Redirect output to a variable
$isMacos Returns TRUE on Mac OS
-? Display help for the cmdlet MODULES AND PACKAGES
$IsWindows Returns TRUE on Windows OS
$Profile Path to PowerShell profiles Find-Module Search PSGallery for PowerShell modules
$PSBoundParameterValues List parameters and current values. Find-Package Search PSGallery, nuget.org for software
$PSCmdlet Cmdlet/advanced function running KEYBOARD SHORTCUTS Get-Module Find modules/packages installed on system
$PSCommandPath Full path of script being run Get-Package Software installed by package management
$PSItem / $_ Current object in the pipeline Esc Clear line
Other Verbs Install, Uninstall, Update
$PSScriptRoot Directory the script is run from Tab Complete partially entered cmdlet/parameter
Register-PackageSource Allow package sources for installation
$PSVersionTable Details on PowerShell version CTRL+C Stop processing current command
Install-PackageProvider Allow additional package providers (Gist) or
Up/Down Arrow Navigate command history
specific versions
CTRL+S/CTRL+R Search forward/reverse through history
CTRL+ALT+? Show all keybindings
OPERATORS
ADVANCED FUNCTION
Arithmetic +, -, *, /, %
Assignment =, +=, -=, *=, /=, %=
STRINGS PARAMETER ATTRIBUTES
Comparison -eq, -ne, -gt, -lt, -le, -ge How To… Commands/Examples Mandatory Will prompt if missing
Wildcard Compare -like, -notlike Grep / Search Text Select-String Position Allows params in order instead
Split into array “one,two,three” -split “,” of by name
Regex Compare -match, -notmatch, -replace
Join “one”, “two”, “three” -join “, and a “ ValueFromPipeline Allows pipeline input to
Contain Comparison -in, -notin, -contains, -notcontains parameter
Replace “http://mysite.com” -replace “http:”,”https:”
Logical -and, -or, -xor, -not, ! # Decimal Places “Pi is {0:N2}” -f [Math]::Pi ValueFromPipelineByPropertyName Pipeline accepted if property
Format Currency “The price is {0:C}” -f 1.23 name matches
Type -is, -isnot, -as
Format All Caps $a = “I’m yelling”; $a.ToUpper() HelpMessage Sets param help msg
Format All Lower $a = “TOO LOUD”; $a.ToLower()
Insert Characters $a = “abcghij”; $a.Insert(3,"def")
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