How to Flush DNS cache in windows , Linux and MacOS

[mohitht]

Hi All,

DNS cache is entries that translate Internet domain names.It DNS cache becomes poisoned when unauthorized domain names or IP addresses are inserted into it. A cache may become corrupted due to technical glitches or administrative accidents, but DNS cache poisoning is typically associated with computer viruses or other attacks that insert invalid entries which redirect clients to malicious Web sites or other Internet servers.


Flushing DNS cache in Windows

First go to the  command prompot Type the below

ipconfig / flush dns



To Flush DNS cache in  MACOS

open the terminal window and type the command dscacheutil -flushcache


To Flush DNS cache in Linux OS

First install the nscd dameon by# sudo aptitude install nscd

restart the daemon by # sudo /etc/init.d/networking restart

Try