Flush DNS on Linux

On Windows Operating system to delete all DNS query result we use to be use command IPCONFIG /FLUSHDNS, in Linux there's serveral command to flush DNS :

1. Flush dns by restarting NSCD service : 

• $ sudo /etc/init.d/nscd restart
• # service nscd restart
• # service nscd reload

2. Flush dnsmasq DNS cache :

• $ sudo /etc/init.d/dnsmasq restart
• # service dnsmasq restart

3. Flush Caching BIND server DNS Cache :

• # /etc/init.d/named restart
• # rndc restart
• # rndc exec