Get-UpTime.ps1

1. <# 
2. .SYNOPSIS 
3.     Demonstrates uptime using WMI  
4. .DESCRIPTION 
5.     This script used Win32_ComputerSystem to determine how long your system 
6.     has been running. This is a rewrite/improvement of sample 3 at 
7.     http://msdn.microsoft.com/en-us/library/aa394591(VS.85).aspx.  
8. .NOTES 
9.     File Name : Get-UpTime.ps1 
10.     Author : Thomas Lee - tfl@psp.co.uk 
11.     Requires : PowerShell V2 CTP3 
12. .LINK 
13.     Script Posted to:  
14.     http://www.pshscripts.blogspot.com 
15.     Original sample posted at: 
16.     http://msdn.microsoft.com/en-us/library/aa394591(VS.85).aspx 
17. .EXAMPLE 
18.     PS c:\foo> .\Get-UpTime.Ps1 
19.     System Up for: 1 days, 8 hours, 40.781 minutes 
20.  
21. #> 
22.  
23. ## 
24. #  Start of script 
25. ## 
26.  
27. # Helper Function - convert WMI date to TimeDate object 
28. function WMIDateStringToDate($Bootup) { 
29.     [System.Management.ManagementDateTimeconverter]::ToDateTime($Bootup) 
30. } 
31.  
32. # Main script 
33. $Computer = "." # adjust as needed 
34. $computers = Get-WMIObject -class Win32_OperatingSystem -computer $computer 
35.  
36. foreach ($system in $computers) { 
37.     $Bootup = $system.LastBootUpTime 
38.     $LastBootUpTime = WMIDateStringToDate($Bootup) 
39.     $now = Get-Date 
40.     $Uptime = $now - $lastBootUpTime 
41.     $d = $Uptime.Days 
42.     $h = $Uptime.Hours 
43.     $m = $uptime.Minutes 
44.     $ms= $uptime.Milliseconds 
45.     "System Up for: {0} days, {1} hours, {2}.{3} minutes" -f $d,$h,$m,$ms 
46. }  
47. # End script 

Technorati tags: WMI, PowerShell Scripts, Win32_ComputerSystem, System.Management.WMIStringToDate