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ip address

Ubuntu Linux Release an IP Address ( DHCP IP )

How can I release an IP in Ubuntu Linux using command line options?
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Linux / Unix: Look Up IP Addresses

How can I look up IP addresses under UNIX or Linux operating systems using command line options?
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Lighttpd Configure Subdomain

I've main domain configured at http://example.com and I'd like to use http://support.example.com with different files. How do I add subdomain support with Lighttpd web server under UNIX or Linux operating systems?
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Linux: Iptables Find / Check Banned IP Address

How do I find or check IP's that are currently banned using iptables command in Linux? How do I verify that IP address 1.2.3.4 is banned or not in Linux?
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HowTo: Linux Send a Gratuitous ARPs Requests [ Networking ]

How do I send gratuitous ARPs under Linux? How do I tell my DUMMY router that the IP is over here now, under Linux operating systems?
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Iptables Drop IP Address

How do I block particular IP addresses or host with the iptables command under Linux?
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Reverse nslookup Command

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?
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Linux / UNIX Command To Find Out Who Owns a Domain Name

How do I find out who owns a Internet domain name and its ip address?
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Linux Iptables: Add / Delete An IP Address Remotely Using A Shell Script

I've root ssh access and need to add / delete a few IP address on fly using the IPtables command via local shell script. How do I add or delete an IP address remotely over the SSH session under CentOS / Redhat / RHEL / Debian / Ubuntu Linux?
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How To: Find IP Address Owner

I'm getting lots of spam from few IPs. How do I find the owner of an IP address and report them to concern parties?
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