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Articles by Satish Kumar
Page 37 of 94
How to Disable NetworkManager in CentOS/RHEL 8?
NetworkManager is a daemon that manages network connections on Red Hat Enterprise Linux (RHEL) and CentOS systems. It handles both wired and wireless connections, including Ethernet, WiFi, mobile broadband, VPNs, and other network interfaces. The daemon provides a graphical user interface for managing network settings on desktop environments such as GNOME or KDE. NetworkManager is designed to automatically detect and configure connections based on the available network devices and their properties. It uses mechanisms like DHCP (Dynamic Host Configuration Protocol), PPP (Point-to-Point Protocol), and static IP addresses to connect to networks dynamically. Additionally, it supports advanced features like bonding ...
Read MoreCreate bash alias that accepts parameters
When working with Bash scripts or Unix/Linux command line tools, we often write the same command lines over and over again. Often, these command lines are long and must be repeated multiple times. For instance, when logging into a remote server daily, copying a local folder to the remote server, or searching for hidden files or directories within a directory. You can create aliases using the alias command. In this guide, I will show you how to create an alias that accepts parameters on Linux. This is useful if you want to run a single command repeatedly without having ...
Read MoreSend stdout to Multiple Commands
Sending stdout to multiple commands is a fundamental technique in Unix-like operating systems that allows you to process the output of one command through multiple operations simultaneously. This approach is essential for creating efficient data processing pipelines and automating complex workflows. Standard output (stdout) is the default stream where programs write their output data. When you run a command in the terminal, the results typically appear on your screen through stdout. Understanding how to redirect and duplicate this output enables powerful command-line operations. Methods for Sending stdout to Multiple Commands Using Pipes Pipes (|) redirect the ...
Read MoreHow to Find Out Postfix Mail Server Version in Linux?
The Postfix mail server is a fast, secure, and reliable open-source mail transfer agent (MTA) for Linux-based systems. It was designed with security in mind and provides features that make it an excellent choice for businesses requiring high-performance email services. Knowing your Postfix version is crucial for security updates, compatibility checks, and troubleshooting. Why Check Postfix Version? Knowing your Postfix version helps you determine if your installation is up-to-date with security patches and whether there are known vulnerabilities that need addressing. Different versions may have different configuration options or syntax changes, which could affect system operations when installing ...
Read More22 Best Linux Text Editors for Programming & Coding
Linux is a popular operating system among developers and programmers due to its flexibility, customization, and open-source nature. One of the essential tools for developers is a text editor, which enables them to write and edit code efficiently. In this article, we will explore the 22 best Linux text editors for programming and coding, categorized by their strengths and use cases. Command-Line Powerhouses Vim Vim is a powerful modal text editor that is extremely popular among Linux users. It operates entirely through keyboard shortcuts, making it incredibly fast once mastered. Vim's extensive customization options through plugins and ...
Read MoreHow to Fix \'add-apt-repository command not found\' on Ubuntu & Debian?
Ubuntu and Debian users often encounter the "add-apt-repository command not found" error when trying to add third-party repositories. This error occurs because the add-apt-repository command is not installed by default on minimal installations. The command is part of the software-properties-common package and is essential for managing external repositories. Understanding the Problem What is add-apt-repository? add-apt-repository is a command-line utility that allows users to easily add external repositories to their Ubuntu or Debian system. These repositories provide access to additional software packages, PPAs (Personal Package Archives), and updates not available in the default repositories. The command automatically adds ...
Read More25 Big Companies and Devices Running on GNU/Linux
GNU/Linux is a free and open-source operating system that has gained widespread adoption across industries due to its cost efficiency, reliability, and security. From tech giants to government agencies, numerous organizations have embraced GNU/Linux for their critical operations. This article explores 25 prominent companies and devices that rely on GNU/Linux infrastructure. Major Technology Companies Google Google has been utilizing GNU/Linux since its inception. The company's massive server infrastructure, powering services like Search, Gmail, and Google Drive, runs entirely on GNU/Linux. Additionally, Android, Google's mobile operating system used by billions of devices worldwide, is built on the Linux ...
Read MoreHow to Fix \'Can\'t connect to local MySQL server through socket \'var/run/mysqld/mysqld.sock\'?
When you encounter the error message "Can't connect to local MySQL server through socket 'var/run/mysqld/mysqld.sock' (2)", it means there is a problem connecting to your MySQL database server. This error typically occurs when the MySQL client cannot establish communication through the Unix socket file, which is the default connection method for local MySQL connections. This error can occur for various reasons, including the MySQL server not running, incorrect socket file paths, permission issues, or misconfigured MySQL settings. Understanding the root cause is essential for applying the correct fix and restoring database connectivity. Understanding the Error Message A ...
Read More25 Most Used Firefox Add-ons to Improve Productivity in Linux
Firefox is a popular web browser used by millions of people worldwide. One of the reasons for its popularity is its vast array of add-ons, which can enhance productivity and improve user experience. In this article, we will explore 25 most used Firefox add-ons to improve productivity in Linux. Essential Security & Privacy Add-ons uBlock Origin uBlock Origin is an open-source ad-blocker that is highly effective at blocking ads and trackers. It uses minimal system resources and is customizable, allowing users to whitelist specific websites or block certain types of content. NoScript NoScript is a ...
Read MoreThe Use of Swap Space in Modern Linux Systems
Swap space is a designated area on storage devices that the Linux kernel uses to temporarily store data when the system's RAM (Random Access Memory) becomes full. When physical memory is exhausted, the operating system transfers the least-recently-used pages from RAM to swap space, freeing up memory for active processes. This virtual memory mechanism ensures system stability and prevents out-of-memory errors. How Swap Space Works The Linux kernel uses a page replacement algorithm to determine which memory pages should be moved to swap when RAM becomes scarce. When a process needs access to swapped data, the kernel performs ...
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