Clear/Flush DNS cache on Windows Mac and Linux

how to setup and configure simple dns server in debian linux Clear/Flush DNS cache on Windows Mac and LinuxBeing a server administrator I have to deal with a hell lot of ip address and domain names. One of the major problem that I face while configuring a server is sometimes I have to change ip addresses to different domain names for certain purposes and when you go to test if you have successfully established a connection or not the computer gives you an error just because it still has that old ip address in the memory and is constantly trying to connect to a dead ip.

This might be a useful feature for average users who visit Facebook and YouTube dozen of times a day as it reduces the time the browser takes to download pages from the servers of the websites by eliminating the need for a DNS server by caching the most visited url.

So if you are a server admin like me or are a newbie in this field and are facing the same problem clearing/flushing your DNS cache may do your job.

To clear dns in windows: Go to All Programs -> Accessories -> Command Prompt or Go to Run and type cmd. Once in there type

ipconfig /flushdns

Mac and Linux both being UNIX based system have the same method to do this.

For Mac go to Applications -> Terminal

For Linux press Alt+F2 and type in gnome-terminal


Then give the command

dscacheutil -flushcache

This will clear all your DNS cache and should solve your problem If not have a look at your DNS server.

Ashmeet Singh

I have just passed class 12 and am looking forward to making it into a good college. I have also been the writer of many blogs such as TechnoDesi,NewtrojansBlog,GammersLane etc. and this blog is my new endeavour in the field of technology.

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