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Articles on Trending Technologies
Technical articles with clear explanations and examples
Difference between Cold Booting and Warm Booting
When a user presses the power button on their computer, it initiates the process known as booting, which loads and starts the operating system. Booting involves accessing the computer's ROM to load startup instructions, followed by loading the operating system from the boot disk (typically the local hard drive). There are two types of booting − cold booting and warm booting. What is Cold Booting? Cold booting (also called a "hard boot") is the process of starting a computer from a completely powered-off state. During cold boot, the computer must first be shut down completely, then powered on ...
Read MoreHow to encrypt a large file using openssl?
OpenSSL is a powerful cryptographic toolkit that provides various security functions including file encryption. It comes pre-installed on most Linux distributions, but can be installed via package managers if needed. This article demonstrates how to encrypt large files using OpenSSL's public-key cryptography features. Understanding Encryption Types Before diving into file encryption, it's important to understand the two main encryption approaches: Symmetric (Secret-key) encryption − Uses the same key for both encryption and decryption Asymmetric (Public-key) encryption − Uses separate keys for encryption and decryption Public-key encryption is more secure as it eliminates key-sharing concerns, ...
Read MoreNow, Google+VMware Provide Services to Chrome OS
Google and VMware have partnered to make it easier for enterprise Chromebook users to access Windows applications and desktops through cloud-based virtualization. This collaboration enables Chrome OS users to run Windows environments using VMware's Horizon Desktop as a Service (DaaS), which utilizes VMware's HTML5 Blast protocol for seamless streaming. Google + VMware Chrome OS Integration Chrome OS Chromebook User Device HTML5 Blast ...
Read MoreDiff a Directory for Only Files of a Specific Type on Linux
In this article, we are going to learn how to diff a directory for only files of a specific type in Linux. This is particularly useful when you need to compare configuration files, source code, or documentation across directories while ignoring irrelevant file types. The diff Command Overview The diff command is a powerful built-in Linux tool that compares files and directories line by line. When comparing directories, it identifies differences in file contents, missing files, and additional files. However, by default, it processes all files, which can be overwhelming in directories with mixed file types. Basic ...
Read MoreHow to Create a crontab Through a Script on Linux
Creating a crontab through a script on Linux is a simple and efficient way to automate repetitive tasks and schedule them to run at specific intervals. This article explores how to create and manage crontab entries through scripts, including practical examples and troubleshooting tips. What is a Crontab? A crontab (cron table) is a configuration file that specifies shell commands to run periodically on a given schedule. The cron daemon reads these files and executes commands at the specified times. Each user can have their own crontab file, making it useful for tasks such as running backups, sending ...
Read MoreHow to align 3 files based on first column value
When working with data analysis, it is often necessary to align multiple files based on a shared column. This process involves combining data from different sources using a common identifier, typically found in the first column. File alignment is essential for creating comprehensive datasets that can be analyzed effectively. Why Align Multiple Files? In data analysis, we frequently encounter situations where related information is stored across separate files. Aligning these files based on a common column allows us to: Combine data from multiple sources for comprehensive analysis Detect errors and inconsistencies across datasets Create unified reports ...
Read MoreString Manipulation in Bash on Linux
Bash is a shell language used in Linux systems that allows users to interact with the system through a command-line interface. Bash offers several string manipulation capabilities that can help users manipulate and process text strings effectively. Basic String Operations Bash provides fundamental operations for manipulating strings. To create a string variable in Bash, you simply assign a value to a variable name − mystring="Hello, world!" To display contents of a string variable, you can use the echo command − echo $mystring The output will be − Hello, ...
Read MoreDisk Controller in OS
In the world of computing, the Disk Controller is a fundamental component that manages data transfer between a computer's storage devices and its memory. It acts as a crucial interface between storage hardware and the Operating System (OS), enabling efficient communication and data management operations. What is a Disk Controller A Disk Controller is a hardware component that manages the flow of data between a computer's storage devices (hard disk drives, SSDs) and the system memory. It translates high-level OS commands into low-level disk operations, controlling read/write operations and ensuring reliable data transfer. Disk Controller Architecture ...
Read MoreHow to Delete Old Unused Kernels in CentOS, RHEL and Fedora?
Kernel management is a crucial system administration task in CentOS, RHEL, and Fedora. When you install kernel updates, the old versions are kept as a safety measure, but over time these can accumulate and consume valuable disk space, potentially causing boot issues or system slowdowns. Removing old unused kernels frees up disk space, reduces boot menu clutter, and eliminates potential security vulnerabilities in outdated kernel versions. However, it's important to always keep at least one or two recent kernels as backup in case the current kernel encounters issues. Checking the Current Kernel Version Before removing any kernels, ...
Read MoreDeploying MySQL on Kubernetes {Guide}
MySQL is one of the most popular relational database management systems in use today, and running it on Kubernetes can provide a highly scalable and flexible solution for managing your database workload. In this guide, we will walk you through the process of deploying MySQL on Kubernetes, from setting up a Kubernetes cluster to creating a MySQL deployment, adding persistent storage, and exposing the deployment with a service. We will be using YAML files to define our Kubernetes resources, and we will also provide detailed explanations and examples of each step along the way. Whether you're new to Kubernetes ...
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