Link to home
Create AccountLog in
Avatar of Brad Sims
Brad SimsFlag for United States of America

asked on

Assistance with PowerShell Scripting - Windows Scheduled Tasks

I am trying to get PowerShell to run a Scheduled Task if it exists, or create a scheduled task if it doesn't.  I have verified the locations of the files and that the computer names are online and reachable (I have one here at my desk as a test).  The script looks like it runs, and I don't get any errors, but the task isn't created on the remote machine like it should be.  

Did I miss something simple?  Or is my code just wrong.  I am still trying to learn PowerShell, so either scenario is very possible.

$computers = Get-Content -Path C:\Users\****\Desktop\Computers.txt


$taskname = "McAfee Agent Update"
$taskdescription = "Update McAfee Agent Using Service Account"
$action = New-ScheduledTaskAction -Execute '\\share\McAfee.bat' `
  -Argument '-NoProfile -WindowStyle Hidden -command "& Restart-Service -displayname \"McUpdates\""'

foreach ($computer in $computers) {

$taskexists = Get-ScheduledTask | Where-Object {$_.TaskName -like $taskname }

if($taskexists) {

Start-ScheduledTask -TaskName $taskname

} else {


$ts = New-TimeSpan -Days 0 -Hours 0 -Minutes 1
$trigger =  New-ScheduledTaskTrigger -Once -At ((Get-Date) + $ts) 
$settings = New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Minutes 2) -RestartCount 3 -RestartInterval (New-TimeSpan -Minutes 1)


Register-ScheduledTask -Action $action -Trigger $trigger -TaskName $taskname -Description $taskdescription -Settings $settings -User "System"

}

}

Open in new window

ASKER CERTIFIED SOLUTION
Avatar of ITguy565
ITguy565
Flag of United States of America image

Link to home
membership
Create an account to see this answer
Signing up is free. No credit card required.
Create Account
Avatar of Brad Sims

ASKER

Connecting to remote server ******* failed with the following error message : The WinRM client cannot process the request because the server name cannot be resolved. For more information, see 
the about_Remote_Troubleshooting Help topic.
    + CategoryInfo          : OpenError: (*******:String) [], PSRemotingTransportException
    + FullyQualifiedErrorId : ComputerNotFound,PSSessionStateBroken

Open in new window


This gives me an error after I type in my credentials.  I tried username@domain and domain\username formats.  I also restarted the WinRM service on the remote machine.
$machine = $computer
[System.Net.Dns]::GetHostEntry($machine)

Open in new window


I verified DNS is working as well with the statement above.  It returned FQDN and IP addresses.
Well, @ITGuy565 is accurate that your original code did not refer to any remote computers - only the local computer.

I would also use Invoke-Command, normally, to execute something on a remote computer.

But if that isn't working for you, use Test-WsMan to tell you why it isn't working.

However if Test-WsMan fails, you can also try psexec. That may work instead.
Thanks for the help.  Part of the error was due to a proxy setting.  If I would've looked further down the page I originally found the DNS Test Code I would've seen that as well.

https://stackoverflow.com/questions/20400599/getting-error-while-trying-to-invoke-a-powershell-command-on-a-remote-machine

I did have to move two lines down to the "else" statement, but it seems to be working now.  Thanks for the help!

$computers = Get-Content -Path C:\Users\****\Desktop\Computers.txt
$cred = Get-Credential
$taskname = "McAfee Agent Update"
$taskdescription = "Update McAfee Agent Using Service Account"



foreach ($computer in $computers) {
    invoke-command -computername $computer -Credential $cred -ScriptBlock {
        $action = New-ScheduledTaskAction -Execute '\\share\McAfee.bat' `
                -Argument '-NoProfile -WindowStyle Hidden -command "& Restart-Service -displayname \"McUpdates\""'
        $taskexists = Get-ScheduledTask | Where-Object {$_.TaskName -like $taskname }

        if($taskexists) {

        Start-ScheduledTask -TaskName $taskname

        } else {
            $taskname = "McAfee Agent Update"
            $taskdescription = "Update McAfee Agent Using Service Account"
            $ts = New-TimeSpan -Days 0 -Hours 0 -Minutes 1
            $trigger =  New-ScheduledTaskTrigger -Once -At ((Get-Date) + $ts) 
            $settings = New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Minutes 2) -RestartCount 3 -RestartInterval (New-TimeSpan -Minutes 1)
            Register-ScheduledTask -Action $action -Trigger $trigger -TaskName $taskname -Description $taskdescription -Settings $settings -User "System"

            }

    }
}

Open in new window