Month: February 2019

DNS commands (Command Prompt vs PowerShell)

Recently I discovered Windows PowerShell has the ability to clear the local DNS on a machine, just like the traditional Command Prompt. Below is a table of the most common commands I personally use on a day-to-day basis and its PowerShell equivalent(s). Of course there are more PowerShell cmdlets, see the URL below for the complete list.

Command Prompt PowerShell Description
ipconfig /flushdns Clear-DnsClientCache Clears the contents of the DNS client cache.
ipconfig /registerdns Register-DnsClient Registers all of the IP addresses on the computer onto the configured DNS server.
ipconfig /displaydns Get-DnsClientCache Retrieves the contents of the DNS client cache.



Flush DNS Cache with PowerShell

For years I have always been using Windows’s command prompt to flush the DNS cache on a local machine. As we know, that command is pretty well known, “ipconfig /flushdns“. Turns out there is an equivalent command we can run within the PowerShell console, and that is, “Clear-DnsClientCache“. Clear-DnsClientCache does exactly what it states, it clears the contents of the DNS client cache/local machine. Consider this next time you need to flush the local machine’s DNS cache.