William Jeffrey Rankin / Blog / Windows Uptime Using Powershell

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Windows Uptime Using Powershell

By William Jeffrey Rankin, Sun Nov 27 2022

About

A basic version of the Unix uptime command, implemented in PowerShell. Reports uptime only (not user count or load averages). Testing using PowerShell 7.3 and 5.1 on Windows 10.

Usage & Sample Output

jeffr@CALLISTO: D:\Documents\Uptime $ .\uptime.ps1
CALLISTO: 11/27/2022 16:22:20 up 07:12:48

jeffr@IO: C:\Users\jeffr\Documents\Uptime $ .\uptime.ps1
IO: 11/27/2022 16:24:55 up 2 days, 08:32:54

The Code

# uptime - Basic PowerShell implementation of the Unix uptime command

# $Author: jeffr $
# $Date: 2022-11-30 17:04:08 -0500 (Wed, 30 Nov 2022) $
# $Revision: 4 $

$c_time = Get-Date
$b_time = Get-CimInstance -ClassName win32_operatingsystem | Select-Object lastbootuptime
$d_time = New-TimeSpan -Start $b_time.lastbootuptime -End $c_time
$a_d_time = ($d_time.ToString()).Split(':')

# Days and hours
if ($a_d_time[0].Contains('.')) {
    $a_days = $a_d_time[0].Split('.')

    # Day or days?
    if ($a_days[0] -eq 1) {
        $d_str = 'day'
    } else {
        $d_str = 'days'
    }
    $days = "$($a_days[0]) $($d_str), "
    $hours = $a_days[1]
} else {
    $days = ''
    $hours = $a_d_time[0]
}

# Minutes
$minutes = $a_d_time[1]

# Seconds
$a_seconds = ($a_d_time[$a_d_time.Length - 1]).Split('.')

# Output the result
Write-Host "$($env:computername): $($c_time) up $($days)$($hours):$($minutes):$($a_seconds[0])"