Powershell Commands

Windows Resources

https://learn.microsoft.com/en-us/powershell/scripting/learn/ps101/00-introduction?view=powershell-7.3

Basic Commands

Cmdlet              #Commands built into shell written in .NET
Functions           #Commands written in PowerShell language
Parameter           #Argument to a Cmdlet/Function/Script
Alias               #Shortcut for a Cmdlet or Function
Script              #Text files with .ps1 extension
Applications        #Existing windows programs
Pipelines           #Pass objects Get-process word | Stop-Process
Ctrl+c              #Interrupt current command
Left/Right          #Navigate editing cursor
Ctrl+Left/Right     #Navigate a word at a time
Home/End            #End Move to start / end of line
Up/Down             #Move up and down through history
Insert              #Toggles between insert/overwrite mode
F7                  #Command history in a window
Tab/Shift-Tab       #Command line completion

Variables

$var = "string"                     #Assign Variable
$a,$b = 0 or $a,$b = 'a','b'        #Assign Multiple Variables
$a,$b = $b,$a                       #Flip Variables
$var=[int]5                         #Strongly Typed Variable

Help

Get-Command                                 #Get all commands
Get-Command -Module RGHS                    #Get all commands in RGHS module 
Get-Command Get-p*                          #Get all commands starting with get-p 
Get-help get-process                        #Get help for command 
Get-Process | Get-Member                    #Get members of the object 
Get-Process| format-list -properties *      #Get-Process as list with all properties

Scripts

Set-ExecutionPolicy -ExecutionPolicy            #Bypass set ExecutionPolicy to allow all scripts 
."\\c-is-ts-91\c$\scripts\script.ps1”           #Run Script.ps1 script in current scope 
&"\\c-is-ts-91\c$\scripts\script.ps1"           #Run Script.ps1 script in script scope 
.\Script.ps1                                    #Run Script.ps1 script in script scope 
$profile                                        #Your personal profile that runs at launch

Import, Export, Convert

Export-CliXML       Import-CliXML
ConvertTo-XML       ConvertTo-HTML
Export-CSV          Import-CSV
ConvertTo-CSV       ConvertFrom-CSV

Flow Control

If(){} Elseif(){ } Else{ }
while(){}
For($i=0; $i -lt 10; $i++){}
Foreach($file in dir C:\){$file.name}
1..10 | foreach{$_}

Comments, Escape Characters

#Comment            #Just a comment 
<#comment#>         #Multiline Comment 
"`"test`""          #Escape  char`
`t                  #Tab 
`n                  #New line 
`                   #Line continue

Parameters

-Confirm    #Prompt whether to take action 
-WhatIf     #Displays what command would do

Assignment, Logical, Comparison

=, +=, -=, ++,--            #Assign values to variable 
-and, -or, -not,!           #Connect exressions / statements 
-eq, -ne                    #Equal, not equal 
-gt, -ge                    #Greater than, greater than or equal 
-lt, -le                    #Less than, less than or equal 
-replace                    #"Hi" -replace "H","P" 
-match, -notmatch           #Regular expression match 
-like, -notlike             #Wildcard matching 
-contains, -notcontains     #Check if value in array 
-in, -notin                 #Reverse of contains, notcontains

Common Cmdlets

cd, chdir, sl                       #Set-Location 
cat, gc, type                       #Get-Content 
ac                                  #Add-Content 
sc                                  #Set-Content 
copy, cp, cpi                       #Copy-Item 
del, erase, rd, ri, rm, rmdir       #Remove-Item 
mi, move, mv                        #Move-Item 
si                                  #Set-Item 
ni                                  #New-Item 
sleep                               #Start-Sleep 
sajb                                #Start-Job 
compare, diff                       #Compare-Object 
group                               #Group-Object 
curl, iwr, wget                     #Invoke-WebRequest 
measure                             #Measure-Object 
nal                                 #New-Alias 
rvpa                                #Resolve-Path
rujb                                #Resume-Job 
set, sv                             #Set-Variable 
shcm                                #Show-Command 
sort                                #Sort-Object
sasv                                #Start-Service
saps, start                         #Start-Process
sujb                                #Suspend-Job 
wjb                                 #Wait-Job 
?, where                            #Where-Object 
echo, write                         #Write-Output

Common Aliases

gcm                     #Get-Command 
foreach,%               #Foreach-Object 
sort                    #Sort-Object
where, ?                #Where-Object   
diff, compare           #Compare-Object
dir, ls, gci            #Get-ChildItem
gi                      #Get-Item 
copy, cp, cpi           #Copy-Item
move, mv, mi            #Move-Item
del, rm                 #Remove-Item    
rni, ren                #Rename-Item 
fFt                     #Format-Table
fl                      #Format-List
gcim                    #Get-CimInstance
cat, gc, type           #Get-Content
sc                      #Set-Content
h, history, ghy         #Get-History
ihy, r                  #Invoke-History
gp                      #Get-ItemProperty
sp                      #Set-ItemProperty
pwd, gl                 #Get-Location
gm                      #Get-Member
sls                     #Select-String 
cd, chdir, sl           #Set-Location
cls, clear              #Clear-Host

Array Objects

$arr = "a", "b"                 #Array of strings
$arr = @()                      #Empty array 
$arr[5]                         #Sixth array element 
$arr[-3..-1]                    #Last three array elements 
$arr[1,4+6..9]                  #Elements at index 1,4, 6-9
$arr[1] += 200                  #Add to array item value 
$z = $arA + $arB                #Two arrays into single array 
[pscustomobject]@{x=1;z=2}      #Create custom object 
(Get-Date).Date                 #Date property of object

Writing Output and Reading

"This displays a string"                                            #String is written directly to output 
Write-Host "color" -ForegroundColor Red -NoNewLine                  #String with colors, no new line at end 
$age = Read-host "Please enter your age"                            #Set $age variable to input from user 
$pwd = Read-host "Please enter your password" -asSecureString       #Read in $pwd as secure string 
Clear-Host                                                          #Clear Console