Myujth

I am writing a Powershell script to automate a silent install of Avamar Client on multiple machines.

Here is the script that I have written so far, but it keeps coming up with errors:

#Variables
$computername=Get-Content C:PSdeploylist.txt
$sourcefile= "\mydomain.orgpublicAvamarClient-windows-x86_64-7.1.100-370.msi"
$credentials = Get-Credential
#This section will install the software
foreach ($computer in $computername)

 $destinationFolder = "\$computerC$Temp"
 #This section will copy the $sourcefile to the $destinationFolder. If the Folder does not exist it will create it.
 if (!(Test-Path -path $destinationFolder))
 
 New-Item $destinationfolder -Type Directory
 
 Copy-Item -Path $sourcefile -Destination $destinationFolder
 Invoke-Command -ComputerName $computer -ScriptBlock Start-Process 'c:tempAvamarClient-windows-x86_64-7.1.100-370.msi' -ArgumentList msiexec /I -credential $creds

Here is the error that I get:

PS C:Usersn1254937> C:UsersmyuseridDesktopAvamarClient remote install.ps1
cmdlet Get-Credential at command pipeline position 1
Supply values for the following parameters:
A positional parameter cannot be found that accepts argument '/I'.
 + CategoryInfo : InvalidArgument: (:) [Start-Process], ParameterBindingException
 + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.StartProcessCommand
 + PSComputerName : test.mydomain.org

What am I doing wrong?

The definition for -ArgumentList is <String>, which is an array of strings.

As-is, it's seeing it as -ArgumentList msiexec, followed by /I which isn't a valid argument for Start-Process.

To specify multiple arguments you need to provide them as an array of strings, which can be written as a comma-separated list in PowerShell. So to specify your two arguments you'd use -ArgumentList 'msiexec','/I'.

Having said that, I don't believe it will work even if you make that correction. As-is, you're telling it to run the .MSI file, and feeding the .MSI file two arguments: msiexec and /I.

What you should be aiming to do is start msiexec, specifying the .MSI file and the /I as arguments for msiexec.

So try something like:

Start-Process 'msiexec' -ArgumentList 'c:tempAvamarClient-windows-x86_64-7.1.100-370.msi','/I'

Or just:

Start-Process 'msiexec' 'c:tempAvamarClient-windows-x86_64-7.1.100-370.msi','/I'

...since -ArgumentList is actually optional (like -FilePath is).