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How can `Get-Command` return “commands” that aren't really commands?
How can I develop for iPhone using a Windows development machine?How can you find out which process is listening on a port on Windows?How do I get current datetime on the Windows command line, in a suitable format for using in a filename?How do I run two commands in one line in Windows CMD?How to count objects in PowerShell?how to run get-vm command on windows powershellCommandNotFoundException: get-windowsoptionalfeatureWhy are scripted cmdlets listed as functions?Get-Command not behaving as describedExecuting `where.exe` within PowerShell
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'Get-Command' returns a list of all available commands in a powershell session.
The following code evaluates to $false, when passed a string which is not a command:
function f($x) [bool](Get-Command $x -ErrorAction SilentlyContinue)
And it does:
PS C:Windowssystem32> f ls
True
PS C:Windowssystem32> f alkdsjfasd
False
So you would think that the following code would return the list of commands which are not commands -- that is an empty list:
Get-Command | Where-Object [bool](Get-Command $_ -ErrorAction SilentlyContinue) -eq $false
Except it doesn't. It returns the following on a clean Windows Server 2016 VM:
CommandType Name Version Source
----------- ---- ------- ------
Function Get-IseSnippet 1.0.0.0 ISE
Function Import-IseSnippet 1.0.0.0 ISE
Function New-IseSnippet 1.0.0.0 ISE
Function Start-AutologgerConfig 1.0.0.0 EventTracingManagement
Cmdlet Add-ClusteriSCSITargetServerRole 2.0.0.0 IscsiTarget
If I wait a little while and run the same command again, it returns a much longer list:
CommandType Name Version Source
----------- ---- ------- ------
Function Add-RDServer 2.0.0.0 RemoteDesktop
Function Add-RDSessionHost 2.0.0.0 RemoteDesktop
Function Add-RDVirtualDesktopToCollection 2.0.0.0 RemoteDesktop
Function Disable-RDVirtualDesktopADMachineAccountReuse 2.0.0.0 RemoteDesktop
Function Get-IseSnippet 1.0.0.0 ISE
...
Function Test-RDVirtualDesktopADMachineAccountReuse 2.0.0.0 RemoteDesktop
Function Update-RDVirtualDesktopCollection 2.0.0.0 RemoteDesktop
I've checked the files in the RemoteDesktop module, for example, and I've been able to find the functions that are "missing".
What is going on here? How can 'Get-Command' return "commands" that aren't commands?
windows powershell windows-server powershell-5.0 powershell-v5.1
asked Mar 27 at 22:15
Daniel SDaniel S
11 bronze badge
add a comment |
'Get-Command' returns a list of all available commands in a powershell session.
The following code evaluates to $false, when passed a string which is not a command:
function f($x) [bool](Get-Command $x -ErrorAction SilentlyContinue)
And it does:
PS C:Windowssystem32> f ls
True
PS C:Windowssystem32> f alkdsjfasd
False
So you would think that the following code would return the list of commands which are not commands -- that is an empty list:
Get-Command | Where-Object [bool](Get-Command $_ -ErrorAction SilentlyContinue) -eq $false
Except it doesn't. It returns the following on a clean Windows Server 2016 VM:
CommandType Name Version Source
----------- ---- ------- ------
Function Get-IseSnippet 1.0.0.0 ISE
Function Import-IseSnippet 1.0.0.0 ISE
Function New-IseSnippet 1.0.0.0 ISE
Function Start-AutologgerConfig 1.0.0.0 EventTracingManagement
Cmdlet Add-ClusteriSCSITargetServerRole 2.0.0.0 IscsiTarget
If I wait a little while and run the same command again, it returns a much longer list:
CommandType Name Version Source
----------- ---- ------- ------
Function Add-RDServer 2.0.0.0 RemoteDesktop
Function Add-RDSessionHost 2.0.0.0 RemoteDesktop
Function Add-RDVirtualDesktopToCollection 2.0.0.0 RemoteDesktop
Function Disable-RDVirtualDesktopADMachineAccountReuse 2.0.0.0 RemoteDesktop
Function Get-IseSnippet 1.0.0.0 ISE
...
Function Test-RDVirtualDesktopADMachineAccountReuse 2.0.0.0 RemoteDesktop
Function Update-RDVirtualDesktopCollection 2.0.0.0 RemoteDesktop
I've checked the files in the RemoteDesktop module, for example, and I've been able to find the functions that are "missing".
What is going on here? How can 'Get-Command' return "commands" that aren't commands?
windows powershell windows-server powershell-5.0 powershell-v5.1
asked Mar 27 at 22:15
Daniel SDaniel S
11 bronze badge
what happens if you run the commands after a period of time on the command line using the -noprofile flag?
– Ctznkane525
Mar 27 at 22:20
Hmmm ... I'm not sure if I got what the actual question is.Get-Commandreturns cmdlets, functions and aliasses ... all that depending on the underlying OS and installed modules and products
– Olaf
Mar 27 at 22:21
@Ctznkane525 The behavior is identical whether or not I start powershell with the -NoProfile switch. The first run outputs a few commands, the second outputs many more.
– Daniel S
Mar 28 at 1:19
@Olaf It's true that the output of Get-Command is different on different computers, but the output of 'gcm | where [bool](gcm $_ -ErrorAction SilentlyContinue) -eq $false' should always be nothing. No matter what system it's run on. It's like if I take a list of all the files in a folder, and then remove each file that's in the folder, I should be left with an empty list, no matter what folder I do that with.
– Daniel S
Mar 28 at 1:34
I can't fully account for it, butget-commandlists available commands, including modules which are not imported.get-command $_triggers module auto-import. For one example, thewebadministrationmodule on my system claims it will exportBegin-WebCommitDelayas an alias, during import as a normal user it errors because I'm not an admin and cannot access IIS configuration data, and then whatever happens it does not export that alias at all and get-command no longer shows it. I suspect the delay of modules auto-importing, and the change of state during import is involved in this.
– TessellatingHeckler
Mar 28 at 10:27
add a comment |
'Get-Command' returns a list of all available commands in a powershell session.
The following code evaluates to $false, when passed a string which is not a command:
function f($x) [bool](Get-Command $x -ErrorAction SilentlyContinue)
And it does:
PS C:Windowssystem32> f ls
True
PS C:Windowssystem32> f alkdsjfasd
False
So you would think that the following code would return the list of commands which are not commands -- that is an empty list:
Get-Command | Where-Object [bool](Get-Command $_ -ErrorAction SilentlyContinue) -eq $false
Except it doesn't. It returns the following on a clean Windows Server 2016 VM:
CommandType Name Version Source
----------- ---- ------- ------
Function Get-IseSnippet 1.0.0.0 ISE
Function Import-IseSnippet 1.0.0.0 ISE
Function New-IseSnippet 1.0.0.0 ISE
Function Start-AutologgerConfig 1.0.0.0 EventTracingManagement
Cmdlet Add-ClusteriSCSITargetServerRole 2.0.0.0 IscsiTarget
If I wait a little while and run the same command again, it returns a much longer list:
CommandType Name Version Source
----------- ---- ------- ------
Function Add-RDServer 2.0.0.0 RemoteDesktop
Function Add-RDSessionHost 2.0.0.0 RemoteDesktop
Function Add-RDVirtualDesktopToCollection 2.0.0.0 RemoteDesktop
Function Disable-RDVirtualDesktopADMachineAccountReuse 2.0.0.0 RemoteDesktop
Function Get-IseSnippet 1.0.0.0 ISE
...
Function Test-RDVirtualDesktopADMachineAccountReuse 2.0.0.0 RemoteDesktop
Function Update-RDVirtualDesktopCollection 2.0.0.0 RemoteDesktop
I've checked the files in the RemoteDesktop module, for example, and I've been able to find the functions that are "missing".
What is going on here? How can 'Get-Command' return "commands" that aren't commands?
windows powershell windows-server powershell-5.0 powershell-v5.1
asked Mar 27 at 22:15
Daniel SDaniel S
11 bronze badge
'Get-Command' returns a list of all available commands in a powershell session.
The following code evaluates to $false, when passed a string which is not a command:
function f($x) [bool](Get-Command $x -ErrorAction SilentlyContinue)
And it does:
PS C:Windowssystem32> f ls
True
PS C:Windowssystem32> f alkdsjfasd
False
So you would think that the following code would return the list of commands which are not commands -- that is an empty list:
Get-Command | Where-Object [bool](Get-Command $_ -ErrorAction SilentlyContinue) -eq $false
Except it doesn't. It returns the following on a clean Windows Server 2016 VM:
CommandType Name Version Source
----------- ---- ------- ------
Function Get-IseSnippet 1.0.0.0 ISE
Function Import-IseSnippet 1.0.0.0 ISE
Function New-IseSnippet 1.0.0.0 ISE
Function Start-AutologgerConfig 1.0.0.0 EventTracingManagement
Cmdlet Add-ClusteriSCSITargetServerRole 2.0.0.0 IscsiTarget
If I wait a little while and run the same command again, it returns a much longer list:
CommandType Name Version Source
----------- ---- ------- ------
Function Add-RDServer 2.0.0.0 RemoteDesktop
Function Add-RDSessionHost 2.0.0.0 RemoteDesktop
Function Add-RDVirtualDesktopToCollection 2.0.0.0 RemoteDesktop
Function Disable-RDVirtualDesktopADMachineAccountReuse 2.0.0.0 RemoteDesktop
Function Get-IseSnippet 1.0.0.0 ISE
...
Function Test-RDVirtualDesktopADMachineAccountReuse 2.0.0.0 RemoteDesktop
Function Update-RDVirtualDesktopCollection 2.0.0.0 RemoteDesktop
I've checked the files in the RemoteDesktop module, for example, and I've been able to find the functions that are "missing".
What is going on here? How can 'Get-Command' return "commands" that aren't commands?
windows powershell windows-server powershell-5.0 powershell-v5.1
windows powershell windows-server powershell-5.0 powershell-v5.1
asked Mar 27 at 22:15
Daniel SDaniel S
11 bronze badge
asked Mar 27 at 22:15
Daniel SDaniel S
11 bronze badge
asked Mar 27 at 22:15
Daniel SDaniel S
11 bronze badge
asked Mar 27 at 22:15
Daniel SDaniel S
11 bronze badge
asked Mar 27 at 22:15
Daniel SDaniel S
11 bronze badge
11 bronze badge
what happens if you run the commands after a period of time on the command line using the -noprofile flag?
– Ctznkane525
Mar 27 at 22:20
Hmmm ... I'm not sure if I got what the actual question is.Get-Commandreturns cmdlets, functions and aliasses ... all that depending on the underlying OS and installed modules and products
– Olaf
Mar 27 at 22:21
@Ctznkane525 The behavior is identical whether or not I start powershell with the -NoProfile switch. The first run outputs a few commands, the second outputs many more.
– Daniel S
Mar 28 at 1:19
@Olaf It's true that the output of Get-Command is different on different computers, but the output of 'gcm | where [bool](gcm $_ -ErrorAction SilentlyContinue) -eq $false' should always be nothing. No matter what system it's run on. It's like if I take a list of all the files in a folder, and then remove each file that's in the folder, I should be left with an empty list, no matter what folder I do that with.
– Daniel S
Mar 28 at 1:34
I can't fully account for it, butget-commandlists available commands, including modules which are not imported.get-command $_triggers module auto-import. For one example, thewebadministrationmodule on my system claims it will exportBegin-WebCommitDelayas an alias, during import as a normal user it errors because I'm not an admin and cannot access IIS configuration data, and then whatever happens it does not export that alias at all and get-command no longer shows it. I suspect the delay of modules auto-importing, and the change of state during import is involved in this.
– TessellatingHeckler
Mar 28 at 10:27
add a comment |
what happens if you run the commands after a period of time on the command line using the -noprofile flag?
– Ctznkane525
Mar 27 at 22:20
Hmmm ... I'm not sure if I got what the actual question is.Get-Commandreturns cmdlets, functions and aliasses ... all that depending on the underlying OS and installed modules and products
– Olaf
Mar 27 at 22:21
@Ctznkane525 The behavior is identical whether or not I start powershell with the -NoProfile switch. The first run outputs a few commands, the second outputs many more.
– Daniel S
Mar 28 at 1:19
@Olaf It's true that the output of Get-Command is different on different computers, but the output of 'gcm | where [bool](gcm $_ -ErrorAction SilentlyContinue) -eq $false' should always be nothing. No matter what system it's run on. It's like if I take a list of all the files in a folder, and then remove each file that's in the folder, I should be left with an empty list, no matter what folder I do that with.
– Daniel S
Mar 28 at 1:34
I can't fully account for it, butget-commandlists available commands, including modules which are not imported.get-command $_triggers module auto-import. For one example, thewebadministrationmodule on my system claims it will exportBegin-WebCommitDelayas an alias, during import as a normal user it errors because I'm not an admin and cannot access IIS configuration data, and then whatever happens it does not export that alias at all and get-command no longer shows it. I suspect the delay of modules auto-importing, and the change of state during import is involved in this.
– TessellatingHeckler
Mar 28 at 10:27
what happens if you run the commands after a period of time on the command line using the -noprofile flag?
– Ctznkane525
Mar 27 at 22:20
what happens if you run the commands after a period of time on the command line using the -noprofile flag?
– Ctznkane525
Mar 27 at 22:20
Hmmm ... I'm not sure if I got what the actual question is.
Get-Command returns cmdlets, functions and aliasses ... all that depending on the underlying OS and installed modules and products– Olaf
Mar 27 at 22:21
Hmmm ... I'm not sure if I got what the actual question is.
Get-Command returns cmdlets, functions and aliasses ... all that depending on the underlying OS and installed modules and products– Olaf
Mar 27 at 22:21
@Ctznkane525 The behavior is identical whether or not I start powershell with the -NoProfile switch. The first run outputs a few commands, the second outputs many more.
– Daniel S
Mar 28 at 1:19
@Ctznkane525 The behavior is identical whether or not I start powershell with the -NoProfile switch. The first run outputs a few commands, the second outputs many more.
– Daniel S
Mar 28 at 1:19
@Olaf It's true that the output of Get-Command is different on different computers, but the output of 'gcm | where [bool](gcm $_ -ErrorAction SilentlyContinue) -eq $false' should always be nothing. No matter what system it's run on. It's like if I take a list of all the files in a folder, and then remove each file that's in the folder, I should be left with an empty list, no matter what folder I do that with.
– Daniel S
Mar 28 at 1:34
@Olaf It's true that the output of Get-Command is different on different computers, but the output of 'gcm | where [bool](gcm $_ -ErrorAction SilentlyContinue) -eq $false' should always be nothing. No matter what system it's run on. It's like if I take a list of all the files in a folder, and then remove each file that's in the folder, I should be left with an empty list, no matter what folder I do that with.
– Daniel S
Mar 28 at 1:34
I can't fully account for it, but
get-command lists available commands, including modules which are not imported. get-command $_ triggers module auto-import. For one example, the webadministration module on my system claims it will export Begin-WebCommitDelay as an alias, during import as a normal user it errors because I'm not an admin and cannot access IIS configuration data, and then whatever happens it does not export that alias at all and get-command no longer shows it. I suspect the delay of modules auto-importing, and the change of state during import is involved in this.– TessellatingHeckler
Mar 28 at 10:27
I can't fully account for it, but
get-command lists available commands, including modules which are not imported. get-command $_ triggers module auto-import. For one example, the webadministration module on my system claims it will export Begin-WebCommitDelay as an alias, during import as a normal user it errors because I'm not an admin and cannot access IIS configuration data, and then whatever happens it does not export that alias at all and get-command no longer shows it. I suspect the delay of modules auto-importing, and the change of state during import is involved in this.– TessellatingHeckler
Mar 28 at 10:27
add a comment |
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what happens if you run the commands after a period of time on the command line using the -noprofile flag?
– Ctznkane525
Mar 27 at 22:20
Hmmm ... I'm not sure if I got what the actual question is.
Get-Commandreturns cmdlets, functions and aliasses ... all that depending on the underlying OS and installed modules and products– Olaf
Mar 27 at 22:21
@Ctznkane525 The behavior is identical whether or not I start powershell with the -NoProfile switch. The first run outputs a few commands, the second outputs many more.
– Daniel S
Mar 28 at 1:19
@Olaf It's true that the output of Get-Command is different on different computers, but the output of 'gcm | where [bool](gcm $_ -ErrorAction SilentlyContinue) -eq $false' should always be nothing. No matter what system it's run on. It's like if I take a list of all the files in a folder, and then remove each file that's in the folder, I should be left with an empty list, no matter what folder I do that with.
– Daniel S
Mar 28 at 1:34
I can't fully account for it, but
get-commandlists available commands, including modules which are not imported.get-command $_triggers module auto-import. For one example, thewebadministrationmodule on my system claims it will exportBegin-WebCommitDelayas an alias, during import as a normal user it errors because I'm not an admin and cannot access IIS configuration data, and then whatever happens it does not export that alias at all and get-command no longer shows it. I suspect the delay of modules auto-importing, and the change of state during import is involved in this.– TessellatingHeckler
Mar 28 at 10:27