<# .SYNOPSIS Checks the uptime .DESCRIPTION This PowerShell script queries the computer's uptime (time between now and last boot up time) and prints it. .EXAMPLE PS> ./check-uptime.ps1 ✅ OfficePC is up for 13 days since 1/25/2024 .LINK https://github.com/fleschutz/PowerShell .NOTES Author: Markus Fleschutz | License: CC0 #> function TimeSpanAsString([TimeSpan]$uptime) { [int]$days = $uptime.Days [int]$hours = $days * 24 + $uptime.Hours if ($days -gt 2) { return "$days days" } elseif ($hours -gt 1) { return "$hours hours" } else { return "$($uptime.Minutes)min" } } function Test-RegistryValue { param([parameter(Mandatory=$true)][ValidateNotNullOrEmpty()]$Path, [parameter(Mandatory=$true)] [ValidateNotNullOrEmpty()]$Value) try { Get-ItemProperty -Path $Path -Name $Value -EA Stop return $true } catch { return $false } } try { [system.threading.thread]::currentthread.currentculture = [system.globalization.cultureinfo]"en-US" if ($IsLinux) { $lastBootTime = (Get-Uptime -since) $uptime = (Get-Uptime) } else { $lastBootTime = (Get-CimInstance Win32_OperatingSystem).LastBootUpTime $uptime = New-TimeSpan -Start $lastBootTime -End (Get-Date) } $status = "✅" $pending = "" if ($IsLinux) { if (Test-Path "/var/run/reboot-required") { $status = "⚠️" $pending = "with pending reboot (found /var/run/reboot-required)" } } else { $reason = "" if (Test-Path -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired") { $reason += ", ...\Auto Update\RebootRequired" } if (Test-Path -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\PostRebootReporting") { $reason += ", ...\Auto Update\PostRebootReporting" } if (Test-Path -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\RebootPending") { $reason += ", ...\Component Based Servicing\RebootPending" } if (Test-Path -Path "HKLM:\SOFTWARE\Microsoft\ServerManager\CurrentRebootAttempts") { $reason += ", ...\ServerManager\CurrentRebootAttempts" } if (Test-RegistryValue -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Component Based Servicing" -Value "RebootInProgress") { $reason += ", ...\CurrentVersion\Component Based Servicing with 'RebootInProgress'" } if (Test-RegistryValue -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Component Based Servicing" -Value "PackagesPending") { $reason += ", '...\CurrentVersion\Component Based Servicing' with 'PackagesPending'" } if (Test-RegistryValue -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager" -Value "PendingFileRenameOperations2") { $reason += ", '...\CurrentControlSet\Control\Session Manager' with 'PendingFileRenameOperations2'" } if (Test-RegistryValue -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce" -Value "DVDRebootSignal") { $reason += ", '...\Windows\CurrentVersion\RunOnce' with 'DVDRebootSignal'" } if (Test-RegistryValue -Path "HKLM:\SYSTEM\CurrentControlSet\Services\Netlogon" -Value "JoinDomain") { $reason += ", '...\CurrentControlSet\Services\Netlogon' with 'JoinDomain'" } if (Test-RegistryValue -Path "HKLM:\SYSTEM\CurrentControlSet\Services\Netlogon" -Value "AvoidSpnSet") { $reason += ", '...\CurrentControlSet\Services\Netlogon' with 'AvoidSpnSet'" } if ($reason -ne "") { $status = "⚠️" $pending = "with pending reboot (registry has $($reason.substring(2)))" } } Write-Host "$status $(hostname) is up for $(TimeSpanAsString $uptime) since $($lastBootTime.ToShortDateString()) $pending" exit 0 # success } catch { "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])" exit 1 }