• comparitech-powershell-cheatsheet.pdf
• Powershell (quick-n-dirty)
• Powershell Configuration
• Running Powershell Scripts
• Powershell File Operations
• Powershell Output
• Powershell Script Arguments
• Powershell Examples
• https://ss64.com/ps
• Powershell Git

• The Lonely Administrator

• Use h or history command to list history
  • Use #<num> <tab> to recall the command to the command prompt without executing it
  • Use Invoke-History <num> or r <num> to execute the specified command
  • Open stored history in text editor.
    • notepad (Get-PSReadlineOption).HistorySavePath

• Use get-history | out-gridview -Passthru | invoke-history to get and invoke command from history using a grid view. Alternatively, h | ogv -p | r. Or, just create a function for it, function hh {get-history | out-gridview -Passthru | invoke-history}
• Use Ctrl+r to interactively search backward through history and Ctrl+s to search forrward

• Comparison Operators

$fname = "Spunky"
$lname = "Violet"
 
Write-Host "World meet $fname $lname."

• $?, exit code of last operation
• $ARGS, array of arguments passed to script.
• $NULL, variable that represents null value, big surprise.
• $true and $false represent the boolean values

Example of using Out-GridView for handy way to get output

Get-Alias | Out-GridView

Example of selecting a property from objects

$files = ls .\* -Exclude @("*.tmp")
 
$files | select -Property FullName 
 
# Alternative: this method does not include the property header that is included with the Select-Object method above
$files | foreach {$_.FullName}

if (Test-Path $file -eq $True)
{
    Write-Host "Found a file."
}
else
{
    Write-Host "No file found."
}

if ($a -gt 2)
{
    Write-Host "The value $a is greater than 2."
}
elseif ($a -eq 2)
{
    Write-Host "The value $a is equal to 2."
}
else
{
    Write-Host "The value $a is less than 2 or was not created
or initialized."
}

Set-ExecutionPolicy bypass

• -executionpolicy bypass, overrrides local system policy configuration to allow any script to run. Sometimes you just need to get things done.

powershell -executionpolicy bypass -command <command text>

• Sign Powershell Script