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Linux, OS Concepts and Networking

What is ARP? Understanding Address Resolution Protocol Basics (Simple Guide)

When two devices on a local network need to communicate, they don’t rely solely on IP addresses—they … Read more

Check Internet Connection Using a Bash Script

For automation, cron jobs, or IoT devices, you often need to verify internet connectivity before continuing. Here are three bash methods to do it.

A Beginner’s Guide to Linux Initscript: Starting and Stopping Processes During Boot

Linux initscripts are an essential part of the booting process, allowing administrators to automate services that start … Read more

Maximize Network Performance: Measure Throughput Effectively with Netperf

Network throughput is a critical metric that determines the efficiency of your network infrastructure. It helps you … Read more

Understanding C Program Memory Layout: Text, Data, Heap, and Stack Segments Explained

In C programming, understanding how memory is allocated is crucial for writing efficient and bug-free code. The … Read more

Identify all devices in a network using nmap and ARP scan

What is Nmap? Nmap (Network Mapper) is a free and open-source network scanning tool. It is widely … Read more

C Program to Execute Linux Commands

Following program shows how you can run some Linux commands from C program using C library API … Read more

Understanding wireless beacon packet ( captured using pcap API’s )

As per Wikipedia, Beacon frame is one of the management frames in IEEE 802.11 based WLANs. It contains all the … Read more

How to disable and / or enable ICMP ping from Linux host ?

To disable the ICMP ping from certain Linux host, lets say which has IP of 192.168.0.100 use … Read more

What is the Difference between Process and Thread ?

Creating a new thread is very similar to forking a new process, but there are differences. When … Read more

Difference between Spinlock and Semaphore

Spinlocks Spinlocks assume the data you are protecting is accessed in both interrupt-handlers and normal kernel code. … Read more

Difference between Mutex and Semaphore

Besides the better readability, the code for mutex is smaller and slightly faster than the semaphore implementation. … Read more

What is Zombie process and How to create zombie process in Linux

Zombie process is the process which died immediately and whose parent didn’t cared to handled the status … Read more

Encrypt directory in Linux using Encfs

EncFS creates a virtual encrypted filesystem which stores encrypted data in the rootdir directory andmakes the unencrypted … Read more

Install latest version of Node JS on Ubuntu

If you want to install node.js which is gaining popularity in recent days, you can follow below … Read more

Install specific Node JS version on Ubuntu

To install specific version of Node JS, first make sure NPM package manager is installed. You can … Read more

Identify which process keeps port busy on android / Linux

Lets say you are trying to do something with UPNP which reserves port 1900 for all of … Read more

Compile and Install device-tree-compiler (DTC) On Ubuntu

If you want to install device-tree-compiler i.e. dtc command on Ubuntu, use following command, This command will … Read more

List Files Installed by a Linux Package

Use the package database for installed ownership, repository content indexes for packages not installed, and archive queries for downloaded DEB/RPM files. These inventories describe packaged paths—not every file created later by services, scripts, or users.