Function variables need special treatment if you want them available outside the function

http://www.kongsli.net/2013/04/25/powershell-gotchas-refer-to-variables-outside-a-function/

Run Remote Powershell sessions

To prep a machine for a remote powershell session

• Start the Windows Remote Management (WS-Management) Service on the remote machine.
• psexec \\machinename cmd -i
• winrm quickconfig

Once these tasks are complete you can run a remote powershell session in Powershell ISE.  Start this from File_New Remote Powershell Tab

The session displays the machine name at the prompt to signify that the commands are directed at the remote machine.

More here
http://www.howtogeek.com/117192/how-to-run-powershell-commands-on-remote-computers/

Change the file date

Here's a little look at file properties and particularly changing the date.

This lists all the properties you might want to use/set/mess with

get-item "c:\test.txt" | get-member *

This list the time relevent properties

get-item "c:\test.txt" | get-member *time

This changes the CreationTime (remember to use US date format)

get-item "c:\test.txt" | % {$_.CreationTime = '07/28/2016 15:28'}

keywords metadata

Here's an explanation of the % sign usage courtesy of Jeffery Hicks who posted this here


The % symbol is also an alias for ForEach-Object. You would use it in an
expression like this:

cat servers.txt | % { get-wmiobject win32_operatingsystem -computer $_}

And you're right, it is also the modulo operator. In the example you saw,
the expression went through numbers 0 to 15 and formatted them using the -f
operator. The $_ is the current object in the pipeline, ie the numbers 0
through 15.

Hope this explanation helps.

--
Jeffery Hicks MCSE, MCSA, MCT
Microsoft PowerShell MVP

Loops and Call

This is an example of a loop and a call to launch an executable.

This link has examples of other loop types
http://www.winserverhelp.com/2010/04/powershell-tutorial-loops-for-foreach-while-do-while-do-until/2/




# after logon, check for a appv package to be present and then launch it when available.
$IsTextHelpPublishedForMe = $Null

$Count =0
While ($Count -le 10)
    {
       
        $IsTextHelpPublishedForMe = Get-AppvClientPackage -packageid 3227A4B4-269A-4970-84B5-302DC1255E40 | select -expand IsPublishedToUser
                       
        If ($IsTextHelpPublishedForMe -eq "True")
       
            {
            $target = $env:LOCALAPPDATA+"\Microsoft\AppV\Client\Integration\3227A4B4-269A-4970-84B5-302DC1255E40\Root\ReadAndWrite.exe"
            & $target
            exit
            }
       
        Else
            {
            #integer is seconds to wait
            Start-Sleep -s 5
            $Count; $Count +=1
            }
    }

Real World

This post will be updated with Real World quick powershell uses.....

How many Citrix servers are there?
Get-ADComputer -Filter {name -like "*Citrix*Server*Naming*Convention*Pattern*"} | measure

Pending Reboot Check.

Great script to remotely check a PC for a pending reboot...

https://gallery.technet.microsoft.com/scriptcenter/Get-PendingReboot-Query-bdb79542

moved to here

https://github.com/Techsupport4me/David-Powershell/tree/master/Scripts/Get-PendingReboot-Query-bdb79542/Get-PendingReboot

Extract Zip files using Powershell

http://www.howtogeek.com/tips/how-to-extract-zip-files-using-powershell/