Tweak your PowerShell scripts with essential preference variables! Use $ConfirmPreference = 'None' instead of ?Confirm:$false. Disable confirmation dialogs for smooth, unattended execution. Customise your PowerShell environment to suit your needs and increase efficiency!

Hiding confirmations

Occasionally, in scripts you see parameters like ?Confirm:$false. This is explicitly setting a switch parameter to $false, typically in an effort to hide confirmation dialogs and enable a script to run unattended.

Any confirmation dialog that would be suppressible by this parameter can also be turned off on a script-global scope, simply by adding this to the start of the script:

  • $ConfirmPreference = 'None'
$ConfirmPreference = 'None'

Likewise, if cmdlets show progress bars that you dont want to see (i.e. to speed up execution time), simply turn them off:

  • $ProgressPreference = 'SilentlyContinue'
$ProgressPreference = 'SilentlyContinue'

The "preference" set of variables generally enables you to tailor the PowerShell environment to your need:

  • PS C:\> Get-Variable -Name *preference
PS C:\> Get-Variable -Name *preference

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