Skip to main content

PowerShell

Help​

help equal Get-Help | more

Get-Help [<cmdlet>]
    [ -ShowWindow ]
    [ -Detailed | -Full | -Examples ]

Get command info

Get-Command <command>

Alias: gcm

PowerShell version

$PSVersionTable

List​

<expression>[, ...]

Alias​

Get-Alias [[-Name] <alias> | -Definition <cmdlet>]

Property​

Get the properties and methods of objects

<cmdlet> | Get-Member

Alias: gm

Select property

<command> | Select-Object [[-Property] <property[]>]

Alias: select

Expand property

<command> | Select-Object -ExpandProperty <property>
(<command>).<property>

Create property

<command> | Select-Object @{N[ame]="<property name>"; E[xpression]={<expression>}}

Filter object​

<command> | Where-Object [-FilterScript] { <Script> }

# Example
1, 2, 3, 4, 5, 6 | ? { $_ % 2 -eq 0 }
# 2 4 6

Alias: ?

Filter with file size​

List file with file size > 2GB

ls | ? { $_.Length -gt 2gb }

PowerShell remoting​

Enable PowerShell remoting

Enable-PSRemoting [-SkipNetworkProfileCheck] [-Force]

Trusted host​

Get trusted host

winrm get winrm/config/client
Get-Item WSMan:\localhost\Client\TrustedHosts

Set trusted host

winrm set winrm/config/client @{TrustedHosts="<host>[,<host>]"}
# <host> = <IP> | <hostname> | *
Set-Item WSMan:\localhost\Client\TrustedHosts -Value "<host>[,<host>]" [-Force]

Get credential from user input​

Get-Credential [[-UserName] <username>]

PowerShell session​

Create PowerShell session

$<variable> = New-PSSession
    [[-ComputerName] <host[]>]
    [-Credential { <user> | <credential> }]

Connect to remote PowerShell

Enter-PSSession
    [-ComputerName] <host>
    [-Credential { <user> | <credential> }]

Get drive​

Get-PSDrive

Run command​

Referense

Invoke-Command [[-ComputerName] <host[]>]
    [-ScriptBlock] <ScriptBlock>
    [-Credential <PSCredential>]
    [-ArgumentList <argument[]>]
& <ScriptBlock> [<argument[]>]

Execution policies​

Ref: about_Execution_Policies

Get-ExecutionPolicy
Set-ExecutionPolicy <policy>

Unblock script​

Unblock script that was downloaded from the Internet

Unblock-File <path>

History​

Get-History

Alias: history

Search history

Ctrl + R

Get all session history

Get-Content (Get-PSReadlineOption).HistorySavePath

Hash table​

Ref: about_Hash_Tables

$hash = @{
    <name> = <value>;
    [<name> = <value>] ...
}

List keys

$hash.Keys

List values

$hash.Values

Add

$hash[<key>] = <value>
$hash.Add(<key>, <value>)

Remove

$hash.Remove(<key>)

Path​

Get script path

$Script:MyInvocation.MyCommand.Path

Get file name of path

Split-Path -Leaf <path>

Get folder of path

Split-Path <path>

Join path

Join-Path <path> <path> ...

Get system directory​

[System.Environment]::SystemDirectory

List Windows Features​

Get-WindowsOptionalFeature -Online

Clear MRU​

MRU (Most Recently Used)

sp "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\RunMRU\" -Name MRUList -Type String -Value ""

Get route for IP address​

Find-NetRoute -RemoteIPAddress <IP address>

Multi-Line​

<command> `
    <parameter> ...

Run without / hide console​

powershell.exe -WindowStyle Hidden -Command "<command>"

Function​

Parameter​

function <name> [([type]$param1 [,[type]$param2])]
{
    <statement list>
}

function <name>
{
    param([type]$param1 [,[type]$param2])
    <statement list>
}
function Add([int]$a, [int]$b) {
    return $a + $b
}