Get System Up time

less than 1 minute read

Getting the system up time on Windows servers or desktops is a needed task every so often. This information can be found a different ways but occasionally we need this information in our script.

Today we will used PowerShell to get this information.

function Get-SystemUptime
    $operatingSystem = Get-WmiObject Win32_OperatingSystem

$uptime = Get-SystemUptime
Write-Host "The system was last booted at: $uptime"

We start by querying the WMI of the system and storing that in a variable. From there we call a .NET function to convert the UNIX time to a human readable time.

When running the Get-WmiObject Win32_OperatingSystem command we get a limited output but can add Get-WmiObject Win32_OperatingSystem | Select * and we can see the full list of properties. Once we get all the properties we see a LastBootUpTime property, but this is a UNIX like time and we need to convert it.

The .NET class will convert the time to Date Time format.

The console will finally output The system was last booted at: 02/17/2020 12:48:15