Clearing or flushing DNS cache helps in efficient and faster internet surfing. It also prevents issue as a result of stale DNS cache. We have already seen procedure to Flush DNS cache on Windows based computer. Following are quick steps to flush DNS on Linux and Mac OSX.
Flush DNS cache on Linux
With nscd installed, type following commands in the terminal:
sudo apt-get install nscd
and then
sudo /etc/init.d/nscd restart
Flush DNS on Mac OSX
Use lookupd -flushcache command in Mac OSX.
Use dscacheutil -flushcache for Leopard and above OS.