PowerShell notes

Different from bash, PowerShell is object-orriented. Understanding objects are necessary to utilize PowerShell

 Get-NetIPAddress -AddressFamily IPV4 -AddressState Preferred -IncludeAllCompartments | Get-Member


   TypeName: Microsoft.Management.Infrastructure.CimInstance#ROOT/StandardCimv2/MSFT_NetIPAddress

Name                      MemberType     Definition
----                      ----------     ----------
ifIndex                   AliasProperty  ifIndex = InterfaceIndex
Clone                     Method         System.Object ICloneable.Clone()
Dispose                   Method         void Dispose(), void IDisposable.Dispose()
Equals                    Method         bool Equals(System.Object obj)
GetHashCode               Method         int GetHashCode()
GetObjectData             Method         void GetObjectData(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.St...
GetType                   Method         type GetType()
Address                   Property       string Address {get;set;}
AddressOrigin             Property       uint16 AddressOrigin {get;set;}
AddressType               Property       uint16 AddressType {get;set;}
ToString                  ScriptMethod   System.Object ToString();
AddressState              ScriptProperty System.Object AddressState {get=[Microsoft.PowerShell.Cmdletization.GeneratedTypes.NetIPAddress.Address...
PrefixOrigin              ScriptProperty System.Object PrefixOrigin {get=[Microsoft.PowerShell.Cmdletization.GeneratedTypes.NetIPAddress.PrefixO...
Store                     ScriptProperty System.Object Store {get=[Microsoft.PowerShell.Cmdletization.GeneratedTypes.NetIPAddress.Store]($this.P...
SuffixOrigin              ScriptProperty System.Object SuffixOrigin {get=[Microsoft.PowerShell.Cmdletization.GeneratedTypes.NetIPAddress.SuffixO...
Type                      ScriptProperty System.Object Type {get=[Microsoft.PowerShell.Cmdletization.GeneratedTypes.NetIPAddress.Type]($this.PSB...

Get-Member is the key to understanding PowerShell objects

Get-NetIPAddress -AddressFamily IPV4 -AddressState Preferred -IncludeAllCompartments | Get-Member

Then Format-List -Property * will help with properties

Get-WMIObject win32_operatingsystem | Format-List -Property *

PSComputerName : MyComputer
Status : OK
Name : Microsoft Windows 10 Pro|C:\Windows|\Device\Harddisk0\Partition3
FreePhysicalMemory : 21066540
FreeSpaceInPagingFiles : 4976008
FreeVirtualMemory : 25714872
__GENUS : 2
__CLASS : Win32_OperatingSystem
__SUPERCLASS : CIM_OperatingSystem
__DYNASTY : CIM_ManagedSystemElement
__RELPATH : Win32_OperatingSystem=@

Access object properties by (.)

(Get-NetIPAddress -AddressFamily IPV4 -AddressState Preferred -PrefixOrigin Dhcp -IncludeAllCompartments).Ipaddress

Store output to a variable

$object=(Get-NetIPAddress -AddressFamily IPV4 -AddressState Preferred -PrefixOrigin Dhcp -IncludeAllCompartments).Ipaddress

Retrieve a variable value

$object

Check type

$object.GetType()

Use ScriptMethod (ToString)

$text=$object.ToString()
$text.GetType()

Work with strings

Use ScriptMethod (ToString)

$text=$object.ToString()
$text.GetType()

From original strings

(Get-WMIObject win32_operatingsystem).Name

Microsoft Windows 10 Pro|C:\Windows|\Device\Harddisk0\Partition3

Now, split the strings into 3 strings

(Get-WMIObject win32_operatingsystem).Name -split "|"

Microsoft Windows 10 Pro
C:\Windows
\Device\Harddisk0\Partition3

Now, split into fewer strings, only 2

(Get-WMIObject win32_operatingsystem).Name -split "|", 2

Microsoft Windows 10 Pro
C:\Windows|\Device\Harddisk0\Partition3

Now, get only the 1st substring

((Get-WMIObject win32_operatingsystem).Name -split "|", 2)[0]

Microsoft Windows 10 Pro

Run PowerShell script, bypass restriction policy

powershell -ExecutionPolicy Bypass -File

Run PowerShell script, waiting command promt

Read-Host -Prompt "Press Enter to exit"