PowerShell and Batch Cheatsheet

common-tasks.md

Copy-Item

https://technet.microsoft.com/en-us/library/ee156818.aspx

1. Copy a file from source directory to destination directory

Copy-Item c:\source\file.txt c:\destination

2. Copy all files from source directory to destination directory

Copy-Item c:\source\* c:\destination

3. Copy all .txt files from source directory to destination directory

Copy-Item c:\source\*.txt c:\destination

4. Copy source directory to inside destination directory

Copy-Item c:\source c:\destination -Recurse

Test-Path

Test-Path C:\Scripts\Archive

powershellcheatsheet.ps1

# Get current directory of PowerShell script being executed
$MyInvocation.MyCommand.Path
(Get-Item -Path ".\" -Verbose).FullName

# Get Powershell module version
(Get-Module Azure).Version

# Get user's 'Documents' folder
[environment]::getfolderpath("mydocuments")

# Convert UTF-8 string to base 64
$bytes = [System.Text.Encoding]::UTF8.GetBytes("Hello World")
$base64String = [System.Convert]::ToBase64String($bytes)
# Convert base64 to UTF-8 string
$bytes = [System.Convert]::FromBase64String("SGVsbG8gV29ybGQ=")
$utf8String = [System.Text.Encoding]::UTF8.GetString($bytes)

# Add property to a CustomPSObject
Add-Member -InputObject $myPSObject -MemberType NoteProperty -Name "propertyName" -Value "propertyValue"

# List all files recursively in a directory
ls -Path C:\Myfolder -Recurse

# Get all environment variables
ls env:

# List environment variables in an array
$env:Path -split ';'
$env:Path.split(";")

# Set environment variable
$env:JAVA_HOME="C:\Program Files\Java\jdk1.8.0_121"

# Get environment variable ProgramFiles
ls env:ProgramFiles

# Stop a Windows process by it's process name
Get-Process -name Notepad | Stop-Process

# Get environment variable ProgramFiles(x86)
# ls env:ProgramFiles(x86) won't work
dir env:ProgramFiles`(x86`)
dir "env:ProgramFiles(x86)"
${Env:ProgramFiles(x86)}
[Environment]::GetEnvironmentVariable("ProgramFiles(x86)")

# UNC path to a VM in the Windows network
\\server-name\file_path
# UNC path of C:\system32 of a VM in the Windows network
\\server-name\c$\system32

<#
.SYNOPSIS
Gets file encoding.
.DESCRIPTION
The Get-FileEncoding function determines encoding by looking at Byte Order Mark (BOM).
Based on port of C# code from http://www.west-wind.com/Weblog/posts/197245.aspx
.EXAMPLE
Get-ChildItem  *.ps1 | select FullName, @{n='Encoding';e={Get-FileEncoding $_.FullName}} | where {$_.Encoding -ne 'ASCII'}
This command gets ps1 files in current directory where encoding is not ASCII
.EXAMPLE
Get-ChildItem  *.ps1 | select FullName, @{n='Encoding';e={Get-FileEncoding $_.FullName}} | where {$_.Encoding -ne 'ASCII'} | foreach {(get-content $_.FullName) | set-content $_.FullName -Encoding ASCII}
Same as previous example but fixes encoding using set-content
#>
function Get-FileEncoding
{
    [CmdletBinding()] Param (
     [Parameter(Mandatory = $True, ValueFromPipelineByPropertyName = $True)] [string]$Path
    )

    [byte[]]$byte = get-content -Encoding byte -ReadCount 4 -TotalCount 4 -Path $Path

    if ( $byte[0] -eq 0xef -and $byte[1] -eq 0xbb -and $byte[2] -eq 0xbf )
    { Write-Output 'UTF8-BOM' }
    elseif ($byte[0] -eq 0xfe -and $byte[1] -eq 0xff)
    { Write-Output 'Unicode' }
    elseif ($byte[0] -eq 0 -and $byte[1] -eq 0 -and $byte[2] -eq 0xfe -and $byte[3] -eq 0xff)
    { Write-Output 'UTF32' }
    elseif ($byte[0] -eq 0x2b -and $byte[1] -eq 0x2f -and $byte[2] -eq 0x76)
    { Write-Output 'UTF7'}
    else
    { Write-Output 'ASCII' }
}