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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to Explore Linux with Installed Help Documentations and Tools?
Linux is an open-source operating system that has become increasingly popular since its development by Linus Torvalds in 1991. Unlike proprietary operating systems, Linux is free to use, modify, and distribute. Its numerous benefits, including flexibility, security, and stability, make it a preferred choice for developers and users worldwide. Understanding the Basics of Linux Linux Operating System Overview Linux is a Unix-like operating system that shares many similarities with Unix, developed in the 1970s. While it uses a command-line interface, many modern distributions also include graphical user interfaces. The Linux kernel manages hardware resources such as memory, ...
Read MoreComputer Storage Structure
Computer Storage Structure refers to the hierarchical organization of storage devices in a computer system. It is traditionally divided into primary storage, secondary storage, and tertiary storage, each serving different purposes based on speed, capacity, and cost considerations. Computer Storage Hierarchy CPU Cache RAM ROM Primary Storage Fast Access • ...
Read MoreHow are iOS and Android similar? How are they different?
iOS and Android are the two dominant mobile operating systems, powering billions of smartphones and tablets worldwide. While both serve similar core functions, they differ significantly in architecture, philosophy, and user experience. Understanding their similarities and differences helps users make informed decisions when choosing mobile devices. iOS Overview iOS is Apple's proprietary operating system designed exclusively for mobile devices including iPhone, iPad, and iPod Touch. It features a layered architecture with an intermediate layer between applications and hardware, ensuring they don't communicate directly. The lower layers provide basic services while higher layers handle user interface and graphics. ...
Read MoreCopying SSH Keys to different Linux Machine
When working with multiple Linux machines, you often need to copy your SSH keys between systems to enable password-less authentication. This process involves securely transferring your public key from one machine to another and properly configuring the target machine to accept your key for authentication. SSH keys consist of a private key (kept secret on your local machine) and a public key (shared with remote machines). The public key is added to the target machine's authorized_keys file, allowing secure authentication without passwords. SSH Key Structure On your local machine, SSH keys are stored in the .ssh directory ...
Read MoreHow to Enable and Monitor PHP-FPM Status in Nginx?
PHP-FPM (FastCGI Process Manager) is a popular implementation of PHP that provides significant performance improvements over traditional PHP implementations. When combined with Nginx, it creates a powerful web server stack for high-traffic applications. The built-in status monitoring capabilities of PHP-FPM allow administrators to track process health and performance in real-time. Enabling PHP-FPM Status Page PHP-FPM includes a built-in status page that provides real-time information about process states, memory usage, and request statistics. To enable this feature, first locate and edit the PHP-FPM pool configuration file. Step 1: Configure PHP-FPM Pool Open the PHP-FPM pool configuration file. ...
Read MoreHow to Export a PostgreSQL Table to CSV?
PostgreSQL is a powerful open-source relational database management system that provides various features including data export capabilities. One of the most common export formats is CSV (Comma-Separated Values), which allows easy data exchange between different applications and systems. CSV is a simple file format where each row represents a record and fields are separated by commas. The first row typically contains column headers, making the data structure clear and readable. Importance of Exporting PostgreSQL Tables to CSV Exporting PostgreSQL tables to CSV format offers several advantages − Data Sharing − Share data with team members ...
Read MoreFind last Directory or file from a given path
Extracting the last directory or file name from a given path is a common task in shell scripting and Linux command-line operations. For example, from the path /tmp/dir/target, we want to extract target as the final component. While this seems straightforward, there are several edge cases that can cause simple solutions to fail, such as trailing slashes, root directory paths, and filenames containing spaces. Common Solutions Since Linux filesystems use forward slashes (/) as path separators and don't allow slashes in filenames, we can treat the path as slash-separated components and extract the last non-empty element. ...
Read MoreConnecting From Docker Containers to Resources in Host
Docker containers are isolated environments that run applications separately from the host system. While this isolation provides security and consistency, there are legitimate scenarios where containers need to access host resources such as databases, files, or services. This article explores various methods to establish connectivity between Docker containers and host system resources. Host Network Access The simplest approach is to configure containers to use the host network directly. This removes network isolation and allows the container to access all host services as if running natively on the host. docker run --network=host my-container Use case: ...
Read MoreAsymmetric and Symmetric Clustering System
Clustering systems are similar to parallel systems as they both have multiple CPUs. However, a major difference is that clustered systems are created by two or more individual computer systems merged together. The primary goal is to provide high availability and fault tolerance by distributing workload across multiple nodes. There are two main types of clustering systems: asymmetric and symmetric clustering systems. Asymmetric Clustering System In an asymmetric clustering system, one node acts as the primary server that runs all applications, while one or more nodes remain in hot standby mode. The standby nodes continuously monitor the primary ...
Read MoreCritical Section Problem
The critical section problem occurs when multiple processes access shared resources concurrently. A critical section is a code segment where shared variables can be accessed. To maintain data consistency, only one process can execute in its critical section at a time — this requires an atomic operation. All other processes must wait to execute in their critical sections. Critical Section Structure Process 1 Entry Section Critical Section ...
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