Windows
ipconfig /flushdns
Macintosh OS X
sudo dscacheutil -flushcache sudo killall -HUP mDNSResponder
Linux (depend on distribution)
/etc/rc.d/init.d/nscd restart /etc/init.d/nscd restart /etc/init.d/dnsmasq restart /etc/init.d/named restart
Windows
ipconfig /flushdns
Macintosh OS X
sudo dscacheutil -flushcache sudo killall -HUP mDNSResponder
Linux (depend on distribution)
/etc/rc.d/init.d/nscd restart /etc/init.d/nscd restart /etc/init.d/dnsmasq restart /etc/init.d/named restart