Monday, August 20, 2018

Powershell - Create local reboot scheduled task/Check scheduled task

There are two scripts here, one creates several scheduled tasks on a remote computer, as local system account, the reason was before changing domain I could use a old\domain account, but mid-migration the computers were not quiet in the new domain, so a local scheduled task as local system would reboot to finish the process.

The second script checked to see if the identically named scheduled task existed as you can create a new one if the old name is in use, equally I could not delete them if found (bug maybe).

First script


$computers = Import-Csv C:\temp\computerlist.txt
ipconfig /flushdns

foreach ($computers in $computers){
#change for each migration date.
#$date="26/03/2018"
$time1="11:45"
$time2="11:55"
#$time3="14:55"

$ThisComputer=$computers.computername.trim()
$ThisComputer=$ThisComputer + ".old.gov.au"
$taskName1="ADMTPreBoot"
$taskName2="ADMTPostBoot"
 
$didit = Test-Connection $ThisComputer -count 1 -quiet

if ($didit -ne $false) {

#today
#write-host Attempt: $ThisComputer
Write-Host $ThisComputer +  $taskName1 "to computer at" $time1 "and" $time2
c:\windows\system32\schtasks.exe /create /s $ThisComputer /sc once /tn $taskName1 /tr "C:\Windows\System32\shutdown.exe /r /t 30 /f /d P:2:4" /st $time1 /ru "NT authority\local service" >>null
$now=(get-date).AddMinutes(2).ToString("HH:mm")
c:\windows\system32\schtasks.exe /create /s $ThisComputer /sc once /tn ADMTipconfig /tr "ipconfig /registerdns" /st $now /ru "NT authority\local service" >>null
#c:\windows\system32\schtasks.exe /s $ThisComputer /run ADMTIPconfig >>null
#Write-Host "Add schelded reboot for" $taskName2 "to computer" $ThisComputer
c:\windows\system32\schtasks.exe /create /s $ThisComputer /sc once /tn $taskName2 /tr "C:\Windows\System32\shutdown.exe /r /t 30 /f /d P:2:4" /st $time2 /ru "NT authority\local service" >>null
c:\windows\system32\schtasks.exe /create /s $ThisComputer /sc once /tn ADMTgpudate /tr "GPupdate /force" /st $time2 /ru "NT authority\local service" >>null
#Write-Host "Add schelded reboot for" $taskName3 "to computer" $ThisComputer
#c:\windows\system32\schtasks.exe /create /s $ThisComputer /sc once /tn $taskName3 /tr "C:\WINDOWS\CCMSETUP\CCMSETUP.EXE /MP:SCM.NEW.GOV.AU" /st $time3 /ru "NT authority\local service"

#future date (you can do today or this command is in the future)
#c:\windows\system32\schtasks.exe /create /s $ThisComputer /sc once /tn $taskName1 /tr "C:\Windows\System32\shutdown.exe /r /t 30 /f /d P:2:4" /st $time1 /sd $date /ru "NT authority\local service"
#Write-Host "Add schelded reboot for" $time "to computer" $ThisComputer
#c:\windows\system32\schtasks.exe /create /s $ThisComputer /sc once /tn $taskName2 /tr "C:\Windows\System32\shutdown.exe /r /t 30 /f /d P:2:4" /st $time2 /sd $date /ru "NT authority\local service"
}

if ($didit -eq $false) {write-host $ThisComputer " is offline or unreachable"}

}



Second script, check for existing




$computers = Import-Csv C:\temp\computerlist.txt
ipconfig /flushdns

foreach ($computers in $computers){

#change for each migration date.
$ThisComputer=$computers.computername.trim()
$ThisComputer=$ThisComputer + ".wca.gov.au"
$taskName1="ADMTPreBoot"

#look

$didit = Test-Connection $ThisComputer -count 1 -quiet
if ($didit -ne $false)
{
#write-host Attempting to look at $ThisComputer
$isItDone = c:\windows\system32\schtasks.exe /query /v /s $ThisComputer /fo csv | ConvertFrom-Csv | ? TaskName -like *$taskName1* | select "next run time"

if ($isItDone -ne $null) {$ThisComputer + " has scheduled ADMTboots"
############## TO remove
compmgmt.msc /computer:$ThisComputer
##
}

if ($isItDone -eq $null) {$ThisComputer + " no ADMTboots"
############## TO remove
#compmgmt.msc /computer:$ThisComputer
##
}

#made a mistake?
#Write-Host "Removed reboot for" $time " computer" $ThisComputer
#error????
#c:\windows\system32\schtasks.exe /delete /s $ThisComputer /tn $taskName1


# c:\windows\system32\schtasks.exe /Query /s $ThisComputer /tn $taskName1
}
else {write-host $ThisComputer "offline"}
}







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