Reverse nslookup Command

Posted on in Categories , last updated December 3, 2010

How do I use nslookup command line administrative tool for testing and troubleshooting DNS servers including reverse lookup under UNIX or Windows operating systems? How do I look up an IP address of a domain or host on a network using nslookup command?

How To: Make Sure /etc/resolv.conf Never Get Updated By DHCP Client

Posted on in Categories , , , , , , , , last updated April 22, 2014

Q. I’m using GNU/Linux with the Internet Systems Consortium DHCP Client. dhclient, provides a means for configuring one or more network interfaces using the Dynamic Host Configuration Protocol. It also updates my /etc/resolv.conf each time my laptop connects to different network. I would like to keep my existing nameservers. How do I skip /etc/resolv.conf update?