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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to Enable NGINX Status Page?
NGINX is a high-performance web server that requires monitoring for optimal performance. The NGINX Status Page is a built-in module that provides real-time metrics about server activity, including active connections, request counts, and server uptime. This feature helps system administrators monitor performance, identify bottlenecks, and troubleshoot issues efficiently. Understanding NGINX Status Page The NGINX status page displays real-time performance data through the stub_status module. This lightweight monitoring tool provides essential metrics without significantly impacting server performance. Key Metrics Displayed The status page shows several important metrics − Active Connections − Current number of client ...
Read MoreWhat is microKernel in Operating Systems?
Kernel is the main part of an Operating System. It is the first program that is loaded after the boot loader whenever we start a system. The Kernel is present in the memory until the Operating System is shut-down. Kernel provides an interface between the user and the hardware components of the system. Whenever a process makes a request to the Kernel, then it is called System Call. Functions of Kernel The functions of the kernel are as follows − Process management Access computer resources Device management Memory management Interrupt handling I/O communication ...
Read MoreMove All Files Including Hidden Files Into Parent Directory in Linux
In Linux, hidden files (also called dotfiles) are files whose names begin with a dot (.) character. These files typically store configuration data or system settings that should be handled carefully. When you need to move all files from a subdirectory to its parent directory, including these hidden files, Linux provides several effective methods. Using the mv Command The mv command is the standard tool for moving files and directories from one location to another. It can also be used to rename files and directories. Moving Visible Files Only To move all visible files from a ...
Read MoreSave Modifications In-Place with AWK
The AWK command is a versatile tool used in Unix and Linux environments for text processing and manipulation. One of its key features is the ability to modify files in-place, which is particularly useful when working with large datasets or when you need to update configuration files directly without creating temporary copies. Understanding AWK AWK is a programming language designed for processing text files, with a primary focus on processing rows of data. It operates on a pattern-action paradigm where each line of input is tested against patterns, and corresponding actions are executed when matches are found. ...
Read MoreDifference between ZFS and UFS
The file systems ZFS (Zettabyte File System) and UFS (Unix File System) are both used in Unix-based operating systems. While both have been designed to manage and store data, they have numerous fundamental differences in architecture, features, and capabilities. ZFS is a modern file system that prioritizes data integrity and provides advanced levels of data protection through features such as checksumming, snapshots, and RAID-Z. UFS is an older, traditional file system developed in the early days of Unix that focuses on simplicity and reliability but lacks many of ZFS's advanced features. What is ZFS? ZFS (Zettabyte File ...
Read MoreHow to Enable NUX Dextop Repository on RHEL/CentOS 8
The NUX Dextop repository is a third-party package repository that provides multimedia and desktop packages for Red Hat Enterprise Linux (RHEL) and CentOS systems. Since RHEL/CentOS does not include multimedia software by default due to licensing restrictions, NUX Dextop serves as an essential source for media players, codecs, video editors, and desktop environment packages. This repository requires the EPEL (Extra Packages for Enterprise Linux) repository as a dependency, as it provides additional packages not available in standard RHEL/CentOS repositories. Prerequisites RHEL/CentOS 8 system with latest updates Root access or sudo privileges to execute commands Internet connection ...
Read MoreDNS Best Practices for Security and Performance
DNS (Domain Name System) is the internet's address book, translating human-readable domain names into IP addresses. While essential for web browsing, DNS is also a prime target for cyber attacks including cache poisoning, DDoS attacks, and DNS hijacking. Implementing proper security and performance practices is crucial for maintaining a robust DNS infrastructure. This article covers essential DNS best practices to enhance both security and performance, helping you build a resilient DNS infrastructure that protects against threats while delivering optimal user experience. Use DNSSEC DNSSEC (Domain Name System Security Extensions) provides cryptographic authentication for DNS responses, preventing attackers ...
Read MoreDifference Between Table-driven and Cyclic Scheduling
Scheduling algorithms play a crucial role in managing the execution of tasks in operating systems and real-time systems. Two common scheduling approaches are table-driven scheduling and cyclic scheduling. These approaches have distinct characteristics and are suitable for different types of systems and scheduling requirements. What is Table-driven Scheduling? Table-driven scheduling, also known as static scheduling, involves creating a predefined table that specifies the execution order and time requirements for each task or process. The table contains a schedule for the entire duration of the system's operation. The scheduler follows the table to determine which task should execute at ...
Read MoreHow do modules improve monolithic and micro kernel approaches?
In an operating system, different modules are involved and all these modules perform different tasks at different stages. Modules are the basic building blocks of an operating system that can be loaded and unloaded dynamically without requiring system restart. The modules are designed for performing specific tasks and these services are dynamically implemented by all operating systems. A number of modules work together to provide complete operating system functionality. Key Operating System Modules The different modules that are involved in operating system are as follows − Scheduling Module − Manages process scheduling algorithms and CPU ...
Read MoreHow to Enable or Disable SELinux Boolean Values?
SELinux (Security-Enhanced Linux) is a security module that provides mandatory access control (MAC) to Linux-based systems. The SELinux module works by ensuring that each process and user on the system only has access to the resources they need. It does this by defining security contexts for processes, files, and other system resources. One of the key features of SELinux is its use of boolean values. These are binary options that can be set to either "on" or "off" to control specific policy behaviors without modifying the entire security policy. What are SELinux Boolean Values SELinux boolean values ...
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