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    <p>You are probably referring to the <code>-WhatIf</code> and <code>-Confirm</code> parameters on cmdlets. You can read up about them in <code>Get-Help about_commonParameters</code>:</p> <blockquote> <p><strong>Risk Management Parameter Descriptions</strong></p> <pre><code>-WhatIf[:{$true | $false}] </code></pre> <blockquote> <p>Displays a message that describes the effect of the command, instead of executing the command.</p> <p>WhatIf parameter overrides the value of the <code>$WhatIfPreference</code> variable for the current command. Because the default value of the <code>$WhatIfPreference</code> variable is <code>0</code> (disabled), WhatIf behavior is not performed without the WhatIf parameter. For more information, type the following command:</p> <pre><code>get-help about_preference_variables </code></pre> <p><em>Valid values:</em></p> <p><code>$true</code> (<code>-WhatIf:$true</code>). Has the same effect as <code>-WhatIf</code>.<br> <code>$false</code> (<code>-WhatIf:$false</code>). Suppresses the automatic WhatIf behavior that results when the value of the $WhatIfPreference variable is 1.</p> <p>For example, the following command uses the <code>WhatIf</code> parameter in a <code>Remove-Item</code> command:</p> <pre><code>PS&gt; remove-item date.csv -whatif </code></pre> <p>Instead of removing the item, Windows PowerShell lists the operations it would perform and the items that would be affected. This command produces the following output:</p> <pre><code>What if: Performing operation "Remove File" on Target "C:\ps-test\date.csv". </code></pre> </blockquote> <pre><code>-Confirm[:{$true | $false}] </code></pre> <blockquote> <p>Prompts you for confirmation before executing the command.</p> <p>The Confirm parameter overrides the value of the $ConfirmPreference variable for the current command. The default value is High. For more information, type the following command:</p> <pre><code>get-help about_preference_variables </code></pre> <p><em>Valid values:</em></p> <p><code>$true</code> (<code>-WhatIf:$true</code>). Has the same effect as <code>-Confirm</code>.<br> <code>$false</code> (<code>-Confirm:$false</code>). Suppresses automatic confirmation, which occurs when the value of <code>$ConfirmPreference</code> is less than or equal to the estimated risk of the cmdlet.</p> <p>For example, the following command uses the Confirm parameter with a Remove-Item command. Before removing the item, Windows PowerShell lists the operations it would perform and the items that would be affected, and asks for approval.</p> <pre><code>PS C:\ps-test&gt; remove-item tmp*.txt -confirm </code></pre> <p>This command produces the following output:</p> <pre><code>Confirm Are you sure you want to perform this action? Performing operation "Remove File" on Target " C:\ps-test\tmp1.txt [Y] Yes [A] Yes to All [N] No [L] No to All [S] Suspend [?] Help (default is "Y"): </code></pre> </blockquote> </blockquote>
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    1. POhow to use 'dry-run' in powershell
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    1. COthank you! so if I understood you right, all I need is add an param called $whatif and value it depend on change, so the console will not operate until $whatif -eq $true am I right?
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