Today in slashprog Mr.geraldin took a intro class about DNS.
DNS, the name stands for Domain Name Server. He stared wit “purpose of DNS, History of DNS and how to configure DNS in a redhat m/c” . Today fully he took a theoretical class ly. Today ly i come to know, In over all world, There is a 13 Root Name-server. This 13 Root Name-servers placed in worldwide.
We can see the Root Servers around the globe.
For more details about Root Name Server.
And one more, today i leant about “dig” command. dig command used for find out the IP Address for a name web-site address.
dig – DNS lookup utility
[root@mercury named]# dig www.google.com ; <<>> DiG 9.7.2-P2-RedHat-9.7.2-2.P2.fc14 <<>> www.google.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50422 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.google.com. IN A ;; ANSWER SECTION: www.google.com. 127823 IN CNAME www.l.google.com. www.l.google.com. 19 IN A 18.104.22.168 ;; Query time: 49 msec ;; SERVER: 192.168.1.1#53(192.168.1.1) ;; WHEN: Sun Feb 6 15:18:50 2011 ;; MSG SIZE rcvd: 68
That’s all abt today. Next Sunday may be i ve Demo section on DNS configuration.