There are a few computers on my domain that I have access to remote into with PowerShell. I'm getting extremely slow performance when I remote into a particular computer with a command like this:
Invoke-Command -ComputerName someComputerName -ScriptBlock { ls C:\ } -credential myUsername
It takes about 10 seconds to display each file/folder on the drive. If I run the same command from within a session using Enter-PSSession then there are no performance issues. Also if I run a command like Get-Alias with Invoke-Command there are no performance issues. Lastly I can run any command on any other computer without any performance issues.
Any idea what could be causing this?
Thanks!
Could be a bandwidth issue. Does this run any faster?
convertfrom-csv (Invoke-Command -ComputerName someComputerName -ScriptBlock { ls C:\ | convertto-csv} -credential myUsername)
Related
Assume I am running my machine as mydomain\myuser and I need to run some tools that require auth against someone elses domain. I do the following
runas /user:theirdomain\theiruser /netonly powershell.exe
Then in any powershell commands that I run in that powershell window I need to detect the theirdomain\theiruser that I ran with.
This was discussed here but for .net and there wasn't any solutions.
The implication was that you could run something remoted somewhere and be able to then ask that remote server what user they are using. I don't have any powershell remoting knowledge but lets assume that I have a Powershell running server somewhere that I could run a remote command against - could I use that to capture the NetOnly username?
in the meantime I think I will try to pass the username separately to the environment somehow but there must be a more elegant solution for this?
Thanks for any thoughts!
I recommend using the following:
Invoke-Command -ScriptBlock {Get-Process} -ComputerName $computerName -Credential (Get-Credential)
or you can use the following:
Enter-PSSession -Credential (Get-Credential) -ComputerName $computerName
If you prefer to run individual commands by hand, with those credentials:
Also, keep in mind Get-credential is not the only way to create a PSCredential, refer to Microsoft documentation for more examples.
I am running a script that involves writing to a database only certain users have access to, so we are running the script as a different user (passing in those user credentials) on our corporate network.
Despite trying things like -NoNewWindow or -WindowStyle Hidden, it always seems to pop up in a new window. This is an issue because when we launch the script from our Jenkins builder with a powershell build step, Jenkins doesn't like the second window and really appears to need it all in the main window.
We are using Start-Process, and the script call looks similar to this (I cut some of the details out):
Start-Process -NoNewWindow powershell.exe -Credential $credential -ArgumentList “Start-Process powershell.exe 'path\script.ps1 -param1 xxx -param2 yyy' -Verb runAs”
Any ideas as to how to get this to actually run without a popup window?
Thanks!
one of these should do the trick to you
Invoke-Command -ComputerName 'Same computer Name' -Credential '(PAss Cred object here)' -ScriptBlock {'Your Scripts Here'}
Invoke-Command -ComputerName 'Same computer Name' -Credential '(PAss Cred object here)' -FilePath 'FilePAthHere'
From my script I want to run some command in remote Windows box. So I googled a little and seems the most popular and somehow standard way to do that is to use PowerShell's Invoke-Command cmdlet which seems to use the same protocol as winrm and winrs. So, bellow are commands I've tried to call from my script (actually I've tried lots of other their modifications as well, but IMO these are enough to illustrate the problem):
PowerShell -Command "$encpass=ConvertTo-SecureString -AsPlainText mypass -Force;$cred = New-Object System.Management.Automation.PSCredential -ArgumentList myuser,$encpass; Invoke-Command -ComputerName REMOTE_COMPUTER_NAME -Credential $cred -ScriptBlock {<fullcommand>};"
PowerShell -Command "$encpass=ConvertTo-SecureString -AsPlainText mypass -Force;$cred = New-Object System.Management.Automation.PSCredential -ArgumentList myuser,$encpass; Invoke-Command -ComputerName REMOTE_COMPUTER_NAME -Credential $cred -ScriptBlock {Start-Process -FilePath <fullexepath> -ArgumentList <arguments> -Wait -NoNewWindow};"
PowerShell -Command "$encpass=ConvertTo-SecureString -AsPlainText mypass -Force;$cred = New-Object System.Management.Automation.PSCredential -ArgumentList myuser,$encpass;$session=new-PSSession -ComputerName "REMOTE_COMPUTER_NAME" -Credential $cred; Invoke-Command -Session $session -ScriptBlock {<fullcommand>};"
NOTE: The script is written in perl, but IMO here the language of the script doesn't matter, so you can suppose that I call the command from batch script, just note, that as commands should run from a script they should not require any interactive actions.
So, I have several problems with these commands, and need help to figure them out. Here they are:
Can't run processes of type configure and run daemon. Namely if I want to run configure_server.pl on remote box (<fullcommand> = "configure_server.pl <arguments>"), which should do some stuff, then run server.exe, it doesn't work, because as soon as configure_server.pl is done, full remote job is being killed including the server.exe which supposed to run as a daemon. (applies to points 1,2,3)
Get wrapped (length of each line is less or equal than 80 chars) standard output and standard error. (applies to point 1,3)
Don't get standard output and standard error. (applies to point 2)
Whew this is a tough one, your kind of all over the place so if I miss what your trying to do completely let me know.
1 . Stop trying to go the remote route. I know it seems like a great idea, but it's not. The only way you can get the process to persist is if you keep the powershell window up on the host computer. As you've probably noticed, you can create processes fine, but they're children of your powershell.exe, and are hosted by the wsmprovhost.exe process on the client computer. Once the parent is gone, all the children are killed
To fix this I suggest using a command line function : Schtasks.exe
schtasks.exe /create /sc ONCE /tn $taskName /tr $command /s $serverName /u $userName /p $pass /ru $userName /rp $pass /st $startTime
This command is going to create a scheduled task to run once and then remove itself after. It even takes computer name, so no remote-access required. You can also do a schtasks.exe /query and check the "Status" for running before you do a schtasks.exe /delete too.
2 . Use the ` (backtick) to specify carry execution to the next line in powershell
3 . I get standard output and error with this function, sometimes not output when executed in a big script, but can always use $? to capture error.
Note: You cannot pass in PSCredentials to this command. I suggest making a GUI that just prompts for userName and and password, without converting to secure string. I try to stay away from remoting in my scripts, since it always just makes everything so slow. Sometimes you do not have a choice, but in this case I believe you do.
I use the following command to run setup_server.exe on remote Windows box:
powershell -command "$encpass=convertto-securestring -asplaintext RPASSWORD -force;$cred = New-Object System.Management.Automation.PSCredential -ArgumentList RUSER,$encpass; invoke-command -computername RCOMPUTERNAME -scriptblock {setup_server.exe} -credential $cred;"
setup_server.exe's task is to create some configuration files and start my_server.exe (some daemon process), then it finishes. And I want my_server.exe to keep running after setup_server.exe is finished.
So when I do it via CMD on local box (i.e. just run setup_server.exe from CMD) it works, but when I do it via powershell on remote host it doesn't work. Namely the my_server.exe gets started, but right after setup_server.exe is closed the server also gets closed(killed).
So the question is following:
Which powershell flags/cmdlets should I use to make the described scenario to work as in local mode?
NOTE: I want synchronously get output of setup_server.exe, so running remote command with -AsJob flag, probably wouldn't work for me, though I even don't know if it will keep the server alive after setup_server.exe's end.
The way to keep the remote PowerShell session running after the command has finished is to use a PSSession e.g.:
$s = new-PSSession computername
Invoke-Command -session $s { ..script.. }
... do other stuff, remote powershell.exe continues to run
Remove-PSSession $s # when you're done with the remote session
Generally though exes should run independently from the app that launched them.
Why are you using Invoke-Command. If you want a persistent Session, use Enter-PSSession.
$s = New-PSSession -Computername "Computername";
Enter-PSSession -Session $s;
setup_server.exe
# Once you are finnished
Exit-PSSession
With 'Enter-PSSession' you are not just Invoking some Command on the Server, you are directly logged-in like you probably know from SSH.
If you want your powershell session to keep running because you are running an exe, try using the -InDisconnectedSession switch. From what I understand, it will run the executable on the remote machine in a session that isn't actually connected to your computer. In essence, your computer will not destroy the session, when it disconnects, allowing the exe to continue to run.
invoke-command -computername RCOMPUTERNAME -scriptblock {start-process setup_server.exe} -InDisconnectedSession
If you need to do this on multiple computers. Setup an array of all the computer names.
Note: I don't believe this works with sessions that are already created.
In order to keep a powershell code running on the session exit it should be a process. And the windows way to keep the process is running a .exe or a windows service.
To keep a Powershell shell open after executing a command, I use the -NoExit switch, e.g. this script starts a remote interactive PS session on servername with user administrator
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -NoExit
-Command "Enter-PSSession -ComputerName servername -Credential administrator"
http://powershell-guru.com/powershell-tip-13-prevent-powershell-from-exiting-once-script-finished/
I am running this command
Invoke-WmiMethod -ComputerName $machine -Credential $cred -Impersonation 3 -Path Win32_process -Name create -ArgumentList "powershell.exe -ExecutionPolicy Unrestricted -File C:\Windows_Updates.ps1" -Verbose
The only problem is in the remote machine, it getting created as a background process. When I open the task manager, I am able to see powershell.exe, but I have no way to identify what is going on. I have looked nearly everywhere but unable to find a solution.
Basically I need to execute the powershell file remotely. I am open to using other solutions where I can see the script running.
I dont think that is possible. Try psexec instead
http://blogs.technet.com/b/heyscriptingguy/archive/2005/09/06/how-can-i-remotely-start-an-interactive-process.aspx
sysinternals psexec
http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx