host command HowTo - Linux / Unix Q & A from nixCraft

How To Find My Public IP Address From Command Line On a Linux

last updated November 25, 2018 in BASH Shell, Debian / Ubuntu, Linux, Networking, UNIX

How do I find out my public IP address on the Linux and OS X Unix command line to use with my own bash shell script without using third party web site? Is there command-line option which will show my dynamic IP address on a Ubuntu or Fedora Linux?

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

last updated June 9, 2017 in BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, RedHat and Friends, Suse, UNIX

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?

How To Look Up DNS on a Linux and Unix Systems

last updated January 12, 2015 in BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, UNIX

How do I look up for DNS (Domain Name System) information on a Linux or Unix-like systems using command line options?

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

last updated August 31, 2013 in Linux, Networking, UNIX, Windows

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?

Linux and Unix host Command Examples

last updated May 16, 2017 in Commands, Linux, UNIX

I am a new Linux and command line user. How do I use host command line utility to verify DNS settings on Linux and Unix-like operating systems? How do I use dig command to find the IP address of a host name or host Name of an IP address?

Linux / Unix: Look Up IP Addresses

last updated April 13, 2011 in Linux, UNIX

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

Linux / UNIX: DNS Lookup Command

last updated January 14, 2014 in Commands, Linux, UNIX

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