Clearing the DNS Cache on Computers and Servers
The following table provides instructions for clearing the DNS cache on computers and servers. The commands need to be run at the command prompt with administrator privileges.
| Computer and DNS Server by OS | Go to Command Prompt | Command to Use to Clear the DNS Cache |
| Windows | Go to Start menu -> Run -> Type cmd -> press Enter/Return | ipconfig /flushdns |
| Mac OSX 10.4 (Tiger) | Click the Terminal icon in the dock or in Finder (in /Applications/Utilities/) | lookupd -flushcache |
| Mac OSX 10.5 & 10.6 (Leopards) | Click the Terminal icon in the dock or in Finder (in /Applications/Utilities/) | dscacheutil -flushcache |
| Mac OSX 10.7 & 10.8 (Lions) | Click the Terminal icon in the dock or in Finder (in /Applications/Utilities/) | sudo killall -HUP mDNSResponder |
| Linux (Most Distributions) | Open a terminal window (gnome-terminal, konsole, xterm, etc.) | sudo /etc/init.d/nscd restart or sudo /etc/init.d/networking restart |