Powershell to get ACLs for folders and subfolders

I have been searching this for long time. Now i have found out

 dir -recurse | Where-Object { $_.PSIsContainer } | Get-Acl

dir -recurse - Is to get all folders and subfolders
$_.PSIsContainer  - Is to check whether the object is a directory or a file
Get-ACL - to get ACLs for folders

Powershell - Get windows service status on a remote computer

Command to get the remote server service status through powershell is listed below

Get-service  -computername "Servername" -displayname "servicename"

Powershell to get server uptime

I dont remember from which site i got the below script but it is very useful in my day to day admin life

$wmi=Get-WmiObject -class Win32_OperatingSystem -computer "Computername"
$LBTime=$wmi.ConvertToDateTime($wmi.Lastbootuptime)
[TimeSpan]$uptime=New-TimeSpan $LBTime $(get-date)
Write-host $server “Uptime: ” $uptime.days “Days” $uptime.hours “Hours” $uptime.minutes “Minutes” $uptime.seconds “Seconds”

Get-WmiObject -class Win32_OperatingSystem
This will invoke the Operating System wmi object


ConvertToDateTime
Will convert the output to human readable form


[TimeSpan]$uptime=New-TimeSpan $LBTime $(get-date)
This will compare the output time with the current time and store the result to the string as object

Powershell - Search a string inside a text file

Get-Content cmd let will allow reading content from a text file and the following piped cmdlet can be used to search a string inside the text file given as input


(Get-Content "Full path of the text file") | ? {$_ -match 'searchstring''}

Uninstalling Previous Versions of PowerShell

Uninstalling Previous Versions of PowerShell

PowerShell v1 RTM shipped as updates to the OS. Therefore, it will show up only in the updates section. To look for previous versions, do the following:

 On Windows XP/Server 2003:

·         Go to Add/Remove Programs

·         Select Show Updates

·         Look for any of the following KB numbers which indicate earlier versions of PowerShell

o   KB926139 – Windows PowerShell v1.0 RTM – English Language Version

o   KB926140 – Windows PowerShell v1.0 RTM – Localized Installation Package

o   KB926141 – Windows PowerShell v1.0 RTM – MUI pack

o   KB925228 – Windows PowerShell v1.0 RC2

·         Versions of V1 prior to RC2 are MSI based installations and they will appear as Windows PowerShell in the programs list

·         Uninstall the previous version that's installed

On Windows Vista:

·         Go to Programs and Features

·         Click on View Installed Updates

·         Look for any of the following KB numbers which indicate earlier versions of PowerShell

o   KB928439 – Windows PowerShell 1.0 RTM

o   KB923569 – Windows PowerShell 1.0 RC2

·         Version of V1 prior to RC2 are MSI based installations and they will appear as Windows PowerShell in the installed programs list

·         Uninstall the previous version that's installed

On Windows Server 2008:

·         Launch Server Manager

·         Go to Features

·         Click on Uninstall Features. This brings up a list of installed features to choose from

·         Select Windows PowerShell and uninstall

 

Article from: http://blogs.msdn.com/b/powershell/archive/2007/12/17/installing-windows-powershell-v2-ctp.aspx

Powershell - Get Powershell version

To get the Powershell version Get-Host cmdlet is used. The following example will show this

Get-host | Select version

 Windows PowerShell 2.0 Administrator's Pocket Consultant

Powershell - Retrieve hotfixes installed on a local or remote computer

To Retrieve hotfix in a computer on a powershell 2.0 version

Get-Hotfix -Description security* | Format-Table Hotfixid,InstalledOn

 Windows PowerShell 2.0 Administrator's Pocket Consultant

Powershell - Setting default printer in the Desktop

In Windows 7 setting a default printer through powershell cmdlets is a easier task when compared to VBscript. It can achieved through fewer commands. The commands and their description are given below

CMDLETS

$Printer = Get-WmiObject win32_printer  | where {$_.name -match "XPS"}

$Printer.SetDefaultPrinter()

"XPS" in the command can be replaced by your printer name , unique word which will exactly point your printer can be mentioned within the quotations  

win32_Printer 

This WMI class will hold all the printer information in your computer

SetDefaultPrinter() 

This method inside Win32_Printer will set the selected printer as a default printer

Windows PowerShell 2.0 Administrator's Pocket Consultant

Powershell - How to check service packs on computers

Service pack of the operating system can found by calling the wmi object win32_operatingsystem. Following commands will enumerate the service pack 
$SP = gwmi win32_operatingsystem
$SP.serivepackmajoreversion

Install and Configure Windows PowerShell

1. Install the Windows Management Framework

• Download and install the Windows Management Framework. Choose the package that includes Windows PowerShell v2 and WinRM 2.0, and that applies to your operating system, system architecture, and language.
  Note   If your local computer is protected by a Microsoft Internet Security and Acceleration (ISA) server, see Windows PowerShell: FAQs for Administrators.

2. Verify that Windows PowerShell can run scripts

1. Click Start > All Programs > Accessories > Windows PowerShell.
2. Do one of the following to open Windows PowerShell:
   • If you're running Windows Vista, Windows 7, or Windows Server 2008 R2, right-click Windows PowerShell and select Run as administrator. If you get a user account control prompt that asks if you would like to continue, respond Continue.
   • If you're running Windows XP or Windows Server 2003, click Windows PowerShell.
3. Run the following command:
   Get-ExecutionPolicy
4. If the value returned is anything other than RemoteSigned, you need to change the value to RemoteSigned.
   Note   When you set the script execution policy to RemoteSigned, you can only run scripts that you create on your computer or scripts that are signed by a trusted source.

Enable scripts to run in Windows PowerShell

In Windows PowerShell session you just opened as an administrator, run the following command:

Set-ExecutionPolicy RemoteSigned

The term is not recognized as a cmdlet, function, operable program, or script file. Verify the term and try again.

You tried to run a command in the current directory but forgot to prepend it with .\
Write the script in notepad , click save as and type "name.ps1"
In the powershell command prompt type PS > .\name.ps1
or
in Run prompt