ip address

Q. How do I Change the IP Address of a Domain or Host under BIND 8 or 9?

{ 1 comment }

Q. I run quite large network with different subnets. I’d like to know how can I find out duplicate IP address under Linux / UNIX? A. You can use arpping command. The arping utility performs an action similar to ping command, but at the Ethernet layer. You can send ARP REQUEST to a neighbor host […]


Q. How do I configure lighttpd web server as virtual host for serving multiple web site from a single public IP address (name-based virtual hosting)? A. Virtual hosting is a method that servers such as webservers use to host more than one domain name on the same server, sometimes on the same IP address. There […]

{ 1 comment }

Q. How do I block ip address of spammers with iptables based firewall under CentOS Linux 5? A. You can simply block IP address of spammers by editing /etc/sysconfig/iptables file under: a) CentOS Linux b) Fedora Linux c) RHEL 4.x/5.x etc Open file /etc/sysconfig/iptables: # vi /etc/sysconfig/iptables Append ip address of spammers as follows: -A […]


I‘ve recently installed Debian Linux 4.0 on my server and Ubuntu Linux 7.04 on Laptop. I would love to have a multiple IP address that I can use for verity of purposes. I would like to bind 4 IP’s to the ‘eth0′ device or NIC. How do I achieve this?


I am a new Linux and Unix command line user. How do I test or check reverse DNS for given IP address under Linux, OS X, BSD, Unix-like or Windows XP/Server 2003 based systems?


Q. I need to get the IP address assigned to eth0 Linux interface. How do I find out IP address only? I don’t want other information displayed by Linux ifconfig command. A. For shell script or may be for other cause you may need the IP address only. You can use ifconfig command with grep […]