Category Archives: Technology

How Blockchain Technology is Revolutionizing Supply Chain Management

July 19, 2024TechnologyAlok Yadav

Blockchain technology, best known for its role in cryptocurrencies like Bitcoin, is making waves in the world of supply chain management. Its ability to provide transparency, security, and efficiency has the potential to revolutionize how goods are produced, tracked, and delivered. In this blog post, we’ll explore how blockchain is transforming supply chain management, discuss … Continue reading How Blockchain Technology is Revolutionizing Supply Chain Management →

How 5G is Revolutionizing the Internet of Things (IoT) and the Importance of Security

July 16, 2024TechnologyAlok Yadav

The advent of 5G technology is set to revolutionize the Internet of Things (IoT), bringing about unprecedented changes in how devices communicate and operate. As 5G networks roll out globally, they promise to deliver faster speeds, lower latency, and greater connectivity. This next-generation network will not only enhance our everyday mobile experiences but also unlock … Continue reading How 5G is Revolutionizing the Internet of Things (IoT) and the Importance of Security →

Quantum Computing: The Next Frontier in Technology

July 15, 2024TechnologyAlok Yadav

As we forge ahead into the digital age, the limits of classical computing are becoming increasingly apparent. Enter quantum computing—a revolutionary paradigm that promises to solve problems previously deemed intractable by leveraging the strange and fascinating principles of quantum mechanics. Today, quantum computing stands on the brink of transforming industries from cryptography to pharmaceuticals, heralding … Continue reading Quantum Computing: The Next Frontier in Technology →

The Rise of Artificial Intelligence in Healthcare: Revolutionizing Patient Care

July 8, 2024TechnologyAlok Yadav

In recent years, the integration of Artificial Intelligence (AI) in healthcare has sparked a revolution, transforming how patient care is delivered and managed. This cutting-edge technology, once relegated to science fiction, is now enhancing medical diagnostics, treatment plans, and operational efficiencies in hospitals worldwide. Understanding AI in Healthcare AI’s application in healthcare spans many areas, … Continue reading The Rise of Artificial Intelligence in Healthcare: Revolutionizing Patient Care →

Parse URL in PHP using `parse_url` and add/modify query parameters

September 16, 2023PHPAlok Yadav

The parse_url function in PHP is used to parse a URL into its components such as scheme, host, path, query, and more. However, it doesn’t have a direct feature for modifying or adding parameters to a URL. To achieve that, you need to manually manipulate the parsed components and then reassemble the URL. Here’s how … Continue reading Parse URL in PHP using `parse_url` and add/modify query parameters →

Preventing form re-submission on reload

September 15, 2023JavaScript, PHPAlok Yadav

Preventing form submission when a user reloads a page can be useful to avoid unintended data resubmission. You can achieve this using the Post/Redirect/Get (PRG) pattern along with JavaScript. Here’s how you can do it: Server-side Handling (Post/Redirect/Get Pattern): When the form is submitted, process the data on the server, perform the necessary actions, and … Continue reading Preventing form re-submission on reload →

Email Validation in Form

September 14, 2023JavaScript, PHPAlok Yadav

Validating an email address can be done using JavaScript on the client-side and PHP on the server-side. It’s important to note that while these methods can help check if an email address is properly formatted, they cannot verify if the email actually exists or if it’s currently in use. Client-Side Email Validation with JavaScript: Here’s … Continue reading Email Validation in Form →

Set Up SMTP Server

October 16, 2022Linux, TechnologyMail, SMTPAlok Yadav

Using an outgoing SMTP server is the traditional method of sending emails. An alternative solution is to bypass the SMTP server and send it directly to the destination. It’s known as Direct Send, and you can use it through specific email software programs. Direct Send is not very reliable though, and here is why: It … Continue reading Set Up SMTP Server →

What is a DMZ?

October 16, 2022Firewall, TechnologyDMZ, SecurityAlok Yadav

A DMZ, or demilitarized zone, is used to help improve the security of an organization’s network by segregating devices, such as computers and servers, on the opposite sides of a firewall. And setting up a DMZ in your home router designates a device as a DMZ host and will forward all the ports to that … Continue reading What is a DMZ? →

Linux iptables Firewall

October 16, 2022Firewall, Linux, TechnologySecurityAk Networks

Today we will discuss in detail the Linux iptables firewall and how to secure your server traffic using that awesome firewall. Table of Contents– Iptables on CentOS 7 How Linux firewall works Firewall types iptables firewall tables Table chains Chain policy Adding iptables rules iptables rules order List iptables rules Deleting Rules Replacing Rules Listing Specific Table … Continue reading Linux iptables Firewall →

Minify JavaScript

October 15, 2022JavaScript, TechnologyToolsAlok Yadav

Minifying JavaScript files can reduce payload sizes and script parse time. The Opportunities section of your Lighthouse report lists all un-minified JavaScript files, along with the potential savings in kibibytes (KiB) when these files are minified. How to minify your JavaScript files Minification is the process of removing whitespace and any code that is not … Continue reading Minify JavaScript →

iptables insert rule at a specific position (prepend)

October 15, 2022Linux, TechnologySecurityAlok Yadav

This is useful for putting rules on the input chain. Usually, you will have a DROP rule at the end of the chain, so if you want to add a new rule, it should go before DROP. To start, figure out which line should be used for the new rule. iptables -L -n –line-numbers You … Continue reading iptables insert rule at a specific position (prepend) →

How to Block IP Address with .htaccess

October 1, 2022IPv4, IPv6, TechnologySecurityAlok Yadav

Quick post today showing some different ways to block visitors via their IP address. This can be useful for a variety of reasons, including stopping some stupid script kiddie from harassing your site or preventing some creepy stalker loser from lurking around your forums or even silencing the endless supply of angry trolls that never seem to … Continue reading How to Block IP Address with .htaccess →

Managing PING through iptables

September 15, 2022Linux, TechnologySecurityAlok Yadav

PING – ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol network. It is available for virtually all operating systems that have networking capability, including most embedded network administration software. Blocking PING on the server is helpful sometimes, if the server continues to face any type of DDoS … Continue reading Managing PING through iptables →

IPv4 Explained for Beginners

July 3, 2022IPv4, TechnologyAlok Yadav

IPv4 has been in use since the start of the Internet and is widely deployed across the Internet, and home networks. In this tutorial, we will cover the basics of IPv4 Addresses. You will Learn IPv4 address structure IPV4 Address classes Special and reserved IP addresses Broadcast Basics Note: If you are new to binary numbers then … Continue reading IPv4 Explained for Beginners →

IPv6 Explained for Beginners

July 2, 2022IPv6, TechnologyAlok Yadav

IPV6 has been developed to replace IPV4 which is running out of addresses. Although it has been around almost 10 years it is still not widely deployed and supported. However, adoption rates are increasing rapidly and IPv6 traffic crossed the 10% threshold in February 2016 (wiki). For small business/home and home office networks, it is likely to … Continue reading IPv6 Explained for Beginners →

How to switch from root user to non-root user during execution using C on Linux

March 31, 2022C Programming, Linux, TechnologyAlok Yadav

Setuid Program Example Here’s an example showing how to set up a program that changes its effective user ID. This is part of a game program called caber-toss that manipulates file scores that should be writable only by the game program itself. The program assumes that its executable file will be installed with the setuid bit set and … Continue reading How to switch from root user to non-root user during execution using C on Linux →

Convert diff output to colorized HTML

March 31, 2022Script, TechnologyToolsAlok Yadav

If you search the web you can find a number of references to programs/scripts that convert diff output to HTML. This is a bash version. The script expects “unified” diff output (diff -u) on its standard input and produces a self-contained colorized HTML page on its standard output. Consider the two files: #include <stdio.h> // main main() { printf(“Hello … Continue reading Convert diff output to colorized HTML →

How to compress files with tar command on Linux/Unix

March 31, 2022Linux, TechnologyToolsAlok Yadav

An archive file is nothing but a collection of files and directories stored in one file. Please note that by default the archive file is not compressed. A compressed file uses less disk space. This blog page explains how to compress, list, and extract files using the tar command on Linux or Unix-like systems. Compress … Continue reading How to compress files with tar command on Linux/Unix →

How to Convert Date and Time from One Time Zone to Another

February 4, 2022JavaScript, PHPTimeZoneAlok Yadav

Using PHP It’s really simple to convert a DateTime from one time zone to another in PHP. Just create a DateTime object using date & time to be converted as the first parameter and the original time zone as the second parameter. Then change the time zone to the desired one using the setTimezone method. That’s all! $date = new DateTime(‘2022-02-01 … Continue reading How to Convert Date and Time from One Time Zone to Another →

5 Amazing Websites on the Internet

February 9, 2021TechnologyToolsAlok Yadav

1. 10 Minute Mail Maybe you want to sign up for a site which requires that you provide an e-mail address to send validation e-mail to. And maybe you don’t want to give up your real e-mail address and end up on a bunch of spam lists. This is nice and disposable. 2. Flightradar24 Flightradar24 … Continue reading 5 Amazing Websites on the Internet →