Networking tutorials and examples

Dig – list all dns records

To list all DNS records of a domain name use the following dig command (after replacing with desired domain) $ dig any ;; read more

How to add more DNS servers to Wi-Fi interface on Mac

When you are using WiFi or wired network using home broadband or mobile hotspot, you are assigned a default DNS server. It sometimes may be read more

DIG quick start tutorial for DNS Lookup

Dig (Domain information groper) can be used to do DNS lookup on Linux, Mac or windows machine. It will connect a DNS server (default or read more

How to view wifi connection speed on Mac

When you setup your wifi router and you mac is connected to it, you may want to know what is wifi link speed (the bandwidth read more

Use x2go to access remote Ubuntu Linux

X2Go enables you to access a graphical desktop of a computer over network. It is a remote desktop solution for Linux. In this article we read more

how to use netcat (nc) to test HTTP url redirection

Netcat (nc) is pretty powerful command line tool on Linux & Mac and can be used to send data on network. It can be quickly read more

Ssh automation on Amazon EC2 Ubuntu Linux

When you create Amazon EC2 instance, you are given a RSA private key to access the instance. On Ubuntu Linux the key is for default read more

How to locally override website domain (or hostname) to IP mapping

When we browse a web site, the browser first do a DNS lookup to find the IP address of the domain name. We can override read more

How to use ssh port forwarding to surf a site from different location

Sometimes we want to access a web site from a different location or ip to see how various things appear on the site. There can read more

How to monitor 404 pages on your site

One of the main activity a webmaster has to perform is to monitor and fix 404 pages (not found pages) on the web sites. When read more

How to use nc (netcat) to print headers sent by a browser

Unix utility nc (netcat) is a pretty handy utility for many network tasks. One such use is to see what headers are being sent by read more