dig command

Linux / Unix: Dig Command Find Out TTL (Time to Live) Value For DNS Records

by on May 5, 2013 · 2 comments

I would like to see the Time-to-live (TTL) value for a ‘AAAA’ and A record for domains. How do I see Time-to-live (TTL) for a DNS record under Unix or Linux operating systems using command line options?

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HowTo: Find Out DNS Server IP Address Used By My Router?

by on April 24, 2012 · 7 comments

My router configured by ISP tech and it is set to get DNS server address automatically from upstream. Is there is a way to find out the IP address of the dns server used by my router which is located at 192.168.1.1? Is there Linux, Unix, Apple OS X, or MS-Windows command that I can use get the same information?

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Linux / Unix: Look Up IP Addresses

by on April 13, 2011 · 0 comments

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

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Linux / UNIX: DNS Lookup Command

by on November 8, 2010 · 5 comments

How do I perform dns lookup under Linux or UNIX or OS X operating systems without using 3rd party web sites for troubleshooting DNS usage?

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Google Apps Domain Create SPF Records For BIND or Djbdns

by on October 19, 2010 · 3 comments

I work for a small business and outsourced our email hosting to Google. However, I noticed that spammers are using our From: First Last to send their spam messages. All bounced messages come to our catch only account. How do I stop this? How do I validate our domain using SPF? How do I configure a SPF for Google Apps domain using BIND 9 or djbdns?

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OpenBSD: Static Routing Configuration

by on July 6, 2010 · 3 comments

I know how to setup static routing under Linux and FreeBSD operating systems. But, how do you setup static routing under OpenBSD operating systems?

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Find the DNS Authority Record for a DNS Domain (SOA)

by on February 5, 2009 · 2 comments

Q. How do I find out the DNS authority record (SOA) for any DNS domain under UNIX / Linux shell?

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