invoke-command_usage

[jvm2016]

hi Luc ,

can you suggest if we can reslolve above error if the destination server has port 5986 open (for https communication)

right now only http(5985)is open .

[LucD]

I'm not sure that will be enough.
Have a look at https://serverfault.com/questions/657918/remote-ps-session-fails-on-non-domain-server  for a more extensive procedure.

[jvm2016]

tx luc ,i m going to check this it seems this should fix .

[jvm2016]

i found this video which has almost everthing covered .thought of sharing .

i will check on some test servers if i find any...

https://www.youtube.com/watch?v=qvJRaYlxI1w

[LucD]

That looks like a decent training series.

[jvm2016]

if you can tell me how to get following from powershell .iam planning to use invoke-command and the script block to get following .

[LucD]

Why Invoke-Command?

You can also do

$computerName = 'MyServer'

$cpu = Get-WmiObject -ComputerName $computerName -Class win32_processor -ErrorAction Stop

$mem = Get-WmiObject -ComputerName $computerName -Class win32_operatingsystem -ErrorAction Stop

[PSCustomObject]@{

    Host = $computerName

    CPU = $cpu.LoadPercentage

    Mem = [math]::Round(($mem.TotalVisibleMemorySize -$mem.FreePhysicalMemory)/$mem.TotalVisibleMemorySize * 100)

}

[jvm2016]

this is to fetch information from remote systems .

so i want to put code in scriptblock and use invoke-command for multiple computers sessions

something like below .

$multisession=new-pssession -computername com1,com2,com3 -credential $cred

$multisesion will have session to multiple computers here com1,com2,com3

now we can use

invoke-command -session $multisession -scriptblock{code}

[LucD]

Then you just use the Get-WmiObject in the scriptblock, minus the CompterName.

[jvm2016]

for the time being let me concentrate on cpu part . i think average part will give us the result which are comparable to the data given by most of the tools used to monitor the cpu usage .

is that correct??

$cpu = Get-WmiObject -ComputerName $computerName -Class win32_processor

[LucD]

Yes, the average would be the single value you see in the Task Manager

[jvm2016]

$sessions=new-pssession -ComputerName com1,com2,com3

invoke-command -Session $sessions -ScriptBlock {

$cpu=Get-WmiObject -Class win32_processor

#$cpu.loadpercentage

$avgcpu=($cpu.loadpercentage | Measure-Object -Average).average

$env:COMPUTERNAME|select @{N = 'cpu percentage usage';E={$avgcpu}}

}

if yu can check the above for cpu (if yu have multiple windows machines) .

[LucD]

I would run it like this

$sessions = New-PSSession -ComputerName com1,com2,com3

Invoke-Command -Session $sessions -ScriptBlock {

    [PSCustomObject]@{

        CPU = ((Get-WmiObject -Class win32_processor).LoadPercentage |

            Measure-Object -Average).average

    }

} | Select PSComputerName,CPU

[jvm2016]

just thought of asking cant we run NE block inside script block.the one i posted ...

is there any thing which is fundamentally wrong??

[LucD]

Not sure what you mean?

What is a "NE block"?

[jvm2016]

sorry i mean

below kind of expression

$env:COMPUTERNAME|select @{N = 'cpu percentage usage';E={$avgcpu}}

[LucD · Accepted solution]

Yes, that is another option, but not in the way you used it.

Like this, it should work

$sessions=new-pssession -ComputerName com1,com2,com3

invoke-command -Session $sessions -ScriptBlock {

    $cpu=Get-WmiObject -Class win32_processor

    $avgcpu=($cpu.loadpercentage | Measure-Object -Average).average

    "" | select @{N='Host';E={$env:COMPUTERNAME}},@{N = 'cpu percentage usage';E={$avgcpu}}

}

[jvm2016]

can you please tell me what is "" before pipeline .are we using it because there is no direct property (i.e computername and avgcpu)

""| select @{N='Host';E={$env:COMPUTERNAME}},@{N = 'cpu percentage usage';E={$avgcpu}}

[LucD]

You have to provide an input object (in this an empty string) to the Select-Object.

And then on the Select-Object you can use calculated properties (your NE block :smileygrin:)

[jvm2016]

Thanks i will be adding memory also .