Socket Programming in JAVA – TCP client and server

As we have already seen, how to write UDP socket programs in JAVA, now we will write … Read more

Solved : java.net.BindException: Address already in use (Bind failed)

If you are working with TCP / UDP sockets in JAVA, there is higher chances your might … Read more

Wait for command execution till Internet is available using fping

Do you want to wait for an internet availability before proceeding further such as send an email … Read more

Understanding ARP (Address Resolution Protocol) basics

The MAC address is how machines on a subnet communicate. When machine A sends packets to another … Read more

How to check if Internet is available using bash script

Do you want to wait for an internet availability before proceeding further such as send an email … Read more

Linux Initscript Example to start and stop process during booting

The below shell script uses start-stop-daemon from “/sbin/start-stop-daemon” to execute the program during booting so that the … Read more

How to identify and kill zombie process in Linux ?

If you already knows whats zombie process and wanted to identify all zombie process’s in you system, … Read more

Wi-Fi Initial Communication between device and access point

wifi-handshaking

Following diagram shows the initial handshaking between the device ( like mobile ) and wireless access-point ( … Read more

iwlist – Get detailed information from a wireless interface

Iwlist is used to display some additional information from a wireless network interface that is not displayed … Read more

How to Install Apache Tomcat on Ubuntu ?

apache tomcat

The Apache Tomcat® software is an open source implementation of the Java Servlet, JavaServer Pages, Java Expression Language … Read more