When you visit a website for the first time, your PC stores the website’s DNS information in its local cache. While this is good for DNS lookup spped, it can cause problems if DNS information has recently changed. In this case you need to “flush” your local cache and in this way force your PC to query for new DNS information.
Below are simple instructions for MS Windows, Mac and Linux users.
Start > Run > type cmd
At the command prompt type the following command and hit Enter:
ipconfig /flushdns
Restart the nscd daemon – type
/etc/rc.d/init.d/nscd restart
in your terminal when logged in as root.
Type
lookupd -flushcache
in your terminal to empty the DNS resolver cache.
Type
dscacheutil -flushcache
in your terminal to empty the DNS resolver cache.