Shutdown/restart command using a variable in powershell

Question

I am working on a GUI reboot modul in a tool of mine. I want to use the command prompt "shutdown" command line for this. Its purpose is to replace the "shutdown -i" on multiple servers and then I can ping them automatically to check if the reboot was succesfull.

In CMD the command line looks like this:

shutdown /r /t 30 /m \\server /c "reboot reason"

In my script I will ask for the:

reason = $comment
time = $time (the value and also in a checkbox if it is required or not)
server name = $server

I will test with a few "if"s the time option, is it checked or not and that the reboot reason is not empty and then add all of them to a variable:

$reboot = "/r /t " + $time + "/m \\" + $server + "/c " + $comment

and then use the variable in the command in powershell:

& shutdown $reboot

My question is will this work? Did anyone use it like this? Or there is a better way to do it? I can't test it for a few days because I don't have any servers right now on the network that I can reboot feely.

I think what you have should work but you could also use the Stop-Computer cmdlet which is there for the same reason . Although you cant seem to get comments with that — Matt
– Matt, Commented Feb 23, 2015 at 15:53
Thank you for the idea. I looked into that restart-computer command, and it looks pretty "variable frindly" but cand't find the "comment" option (it is a must have field for me) This is the Syntax i'v found: Stop-Computer [[-ComputerName] string[]] [[-Credential] PSCredential] [-Authentication AuthenticationLevel] [-Impersonation ImpersonationLevel] [-AsJob] [-Force] [-ThrottleLimit int] [-Confirm] [-WhatIf] [CommonParameters] — Zsolt
– Zsolt, Commented Feb 23, 2015 at 16:35

Frode F. · Accepted Answer · 2015-02-23 16:41:18Z

1

It should work, yes. I would also recommend using an array for the parameters to keep it clean.

$time = 120
$server = "mycomputer"
$comment = "this is my comment."
$reboot = @("/r", "/t", $time, "/m", "\\$server", "/c", $comment)

& shutdown $reboot

Or you could try doing it using WMI (untested):

$time = 120
$comment = "this is my comment."
$server = "mycomputer"

Invoke-WmiMethod -ComputerName $server -Class Win32_OperatingSystem -Name Win32ShutdownTracker -ArgumentList @($time, $comment, 0, 2)

edited Feb 23, 2015 at 16:41

answered Feb 23, 2015 at 16:34

Frode F.

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