It is a good idea to pay attention to the uptime on your servers to make sure their availability jives with what you think it should be. Perhaps a server rebooted due to a blue screen or even worse, because another administrator (or attacker!) did something they shouldn’t have. Looking at system uptime is the poor man’s availability monitor. You may even want to create a script that runs at system startup on your servers, which can serve as a notification mechanism anytime your servers reboot.

Using a command-line interface

All three of the following commands display the system uptime:

> psinfo \\ | findstr Uptime
 > srvinfo \\ | findstr /c:"Up Time"
 > systeminfo /s  | findstr /c:"Up Time"

Using VBScript

' This code prints system uptime for a host.
 ' ------ SCRIPT CONFIGURATION ------
 strComputer = "."   ' e.g., rallen-srv01
 ' ------ END CONFIGURATION ---------
 set objWMIDateTime = CreateObject("WbemScripting.SWbemDateTime")
 set objWMI = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
 set colOS = objWMI.InstancesOf("Win32_OperatingSystem")
 for each objOS in colOS
    objWMIDateTime.Value = objOS.LastBootUpTime
    Wscript.Echo "System Up Time: " & objWMIDateTime.GetVarDate
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