Clear the DNS cache on remote computers

Here’s a tip from my colleague Ed Wilson (the Microsoft Scripting Guy) about how to use PowerShell to clear the DNS cache on remote comptuers: 

Question: You suspect DNS cache corruption, and want to clear the cache on your remote Windows 8.1 computers. How can you use  Windows PowerShell to do this?

Answer: Use the Invoke-Command cmdlet to run the command on the remote computers. Use the Clear-DNSClientCache to perform the clearing. This technique is illustrated here where the DNS cache is cleared from three computers named c1,c2 and c3:

Invoke-Command -script {Clear-DnsClientCache } -ComputerName c1,c2,c3

           NOTE: you will need to run the above command with admin rights

Mitch Tulloch is a nine-time recipient of the Microsoft Most Valuable Professional (MVP) award and a widely recognized expert on Windows administration, deployment and virtualization.  For more information see

Ed Wilson is the bestselling author of eight books about Windows Scripting, including Windows PowerShell 3.0 Step by Step, and Windows PowerShell 3.0 First Steps. He writes a daily blog about Windows PowerShell call Hey, Scripting Guy! that is hosted on the Microsoft TechNet Script Center; for more PowerTips check out the Hey, Scripting Guy! blog.

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