Introduction Port forwarding is a technique that allows a network system to access resources from outside the network by forwarding specific ports. It's a process that involves an intermediary device (such as a router) to accept incoming connections on specified ports, then redirects the traffic to an internal device on the network. The end result is allowing remote devices to connect and communicate with services running on devices within the local network. In practical terms, it means that if you want to run a web server from your home computer, anyone trying to connect from outside your home network ... Read More

Introduction USB drives are popular portable storage devices that have become an integral part of our daily computing lives. They are small, lightweight, and easy to use, allowing us to store and transfer large amounts of data from one computer to another. With the increasing demand for data storage and transfer, USB drives have evolved significantly over the years with larger capacities and faster transfer speeds. In addition to being used for personal data storage and transfers, USB drives are also used for booting operating systems on different computers. Understanding the File Systems Supported by Linux In Linux, ... Read More

Introduction In the world of Unix-like operating systems, the cp command plays an essential role in file management. As the name suggests, this command allows you to copy files from one location to another. Whether you need to duplicate a single file or transfer a folder full of them, cp is the go-to tool for many Linux and macOS users. The basic syntax of the cp command is relatively straightforward - type "cp" followed by the name of the file or directory you want to copy, followed by its destination path. However, there's a common issue that can ... Read More

Introduction In today's world, the internet has become an indispensable part of our daily lives. We rely on it for everything from work to entertainment, and every website we visit is identified by its unique IP address. However, remembering these IP addresses would be difficult, if not impossible. This is where the Domain Name System (DNS) comes in. It translates these numerical IP addresses into readable domain names that are easy to remember. Explanation of DNS Cache When a computer or device connects to the internet or a network, it saves a copy of the DNS information in ... Read More

Introduction If you are a WordPress user and have ever uploaded an image or file, you may have encountered the error message "The Uploaded File Exceeds the upload_max_filesize Directive in php.ini." This error occurs when the file that is being uploaded exceeds the maximum upload size limit set by your server. This limit is set in the PHP configuration file (php.ini) and it can be a frustrating issue for website owners to deal with. The Impact on Website Functionality This error message can have several negative impacts on website functionality. When this error occurs, users cannot upload any files ... Read More

Introduction SSH is a cryptographic network protocol that is widely used for secure data communication, remote shell services or command-line interface access to a computer. SSH replaced the older and less-secure telnet protocol as the go-to method for remote shell access. SSH provides strong encryption and authentication features for data confidentiality, integrity, and authenticity during communication over unsecured networks like the Internet. SSH has become an essential tool for system administrators, developers, network engineers, and enthusiasts who need to securely manage or access computing resources remotely. The Dreaded SSH Connection Refused Error It's common to encounter errors while ... Read More

Introduction WordPress is a popular website platform that powers millions of websites worldwide. However, like any other web platform, it is not immune to errors and glitches. One common error that WordPress users encounter is the 500 Internal Server Error. This error can be frustrating and confusing, especially for non-technical users who are not familiar with server-side errors. The 500 Internal Server Error in WordPress occurs when there is a problem with the server hosting your website. It means that something has gone wrong on the server, but the server cannot pinpoint what caused the issue. Importance of ... Read More

Introduction If you are an Ubuntu user, you might have encountered the sub-process usrbindpkg returned an error code (1) at some point. This error message is one of the most common errors that Ubuntu users experience when updating or installing packages. Many users might not know how to fix this issue, and it can be frustrating when you need to update or install essential packages for your system. Explanation of Error Code (1) The sub-process usrbindpkg returned an error code (1) commonly refers to a package installation failure in Ubuntu. This error typically occurs during the installation of a ... Read More

Introduction Secure Shell (SSH) is a network protocol that allows secure communication between two remote computers. It is widely used for system administration, file transfer, and other secure network services. SSH provides a secure channel over an unsecured network by encrypting the data being transmitted, which makes it virtually impossible for anyone to intercept or modify the data. In today's digital age where cyber-attacks are common occurrences, especially on unsecured networks like public Wi-Fi, it is crucial to protect sensitive information from unauthorized access. This is where SSH comes into play as it provides an extra layer of ... Read More

Introduction As technology advances, so too do cyber threats. Protecting your network from these threats has never been more important. One such threat is the SambaCry vulnerability (CVE-2017-7494), which has the potential to compromise entire networks if left unaddressed. In this article, we will discuss what SambaCry is, why it's important to fix it, and how to address the vulnerability on your Linux system. Understanding Samba and SambaCry Vulnerability What is Samba? Samba is an open-source software package that allows interoperability between Linux/Unix servers and Windows-based clients. It allows Linux/Unix servers to provide services such as file and ... Read More