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Articles by Satish Kumar
Page 51 of 94
Bash Special Variables in Linux
Bash (Bourne Again SHell) is the default shell for most Linux systems. It is a command language interpreter that executes commands from standard input, files, or command-line arguments. Bash provides a set of special variables that contain various system-related and user-related information. These variables are automatically set by the shell and provide crucial data for script execution and system monitoring. What are Bash Special Variables? Bash special variables are predefined variables that store system and user-related information. They are prefixed with the $ symbol and are automatically updated by the shell. These variables are essential for creating robust ...
Read More5 Reasons Why Linux is Better than Windows For Servers
In recent years, Linux has become a popular choice for server operating systems, competing with Windows in the enterprise world. There are several reasons why Linux is considered better than Windows for servers, ranging from cost-effectiveness to security. In this article, we will explore five key reasons why Linux is a better choice for servers than Windows. Open Source Nature One of the biggest advantages of Linux over Windows is its open-source nature. This means that anyone can access and modify the code that makes up the operating system. This is important for servers as it allows administrators ...
Read MoreHow to Install and Configure Ansible on Windows?
Ansible is a popular open-source automation tool that allows system administrators to automate repetitive tasks and manage multiple servers simultaneously. It is widely used for configuration management, application deployment, and task automation. While Ansible is primarily designed for Linux and Unix-based systems, it can also be installed on Windows. In this article, we will guide you through the process of installing and configuring Ansible on Windows. Requirements Before we begin, make sure your Windows machine meets the following requirements − A Windows operating system (Windows 10, Windows 11, or Windows Server 2016 or later) A minimum ...
Read MoreExclude directories while using grep command?
The grep command is a powerful text searching utility in Linux that allows you to search for specific patterns within files. When performing recursive searches across directory trees, you may want to exclude certain directories to improve performance or avoid searching through irrelevant content such as log directories, cache folders, or version control directories. The --exclude-dir option provides an efficient way to skip specified directories during recursive grep operations, making your searches faster and more targeted. Exclude Single Directory To exclude a single directory from your grep search, use the --exclude-dir option with the -R (recursive) flag. ...
Read More4 Free Shell Scripting eBooks for Linux Newbies and Administrators
As Linux continues to gain popularity as an operating system for servers and other computing devices, the need for skilled Linux administrators is on the rise. One crucial skill for any Linux administrator is shell scripting. Shell scripting is the process of creating programs that automate tasks in a Linux environment, making it easier and faster for administrators to manage their systems. If you are new to Linux or are looking to improve your shell scripting skills, there are several free ebooks available to help you get started. In this article, we will explore four free ebooks that are ...
Read More5 Shell Scripts for Linux Newbies to Learn Shell Programming
If you're new to Linux, learning shell scripting can seem daunting at first. However, shell scripting can be an incredibly useful skill to have when working with Linux systems. Shell scripts can automate repetitive tasks, perform system administration tasks, and even help with software development. In this article, we'll look at five essential shell scripts that Linux newbies can learn to get started with shell programming. We'll cover some basics of shell scripting, and provide examples of each script to help you understand how they work. What is Shell Scripting? A shell script is a program written ...
Read MoreHow to Install and Configure Apache Tomcat 9 in CentOS 8/7?
Apache Tomcat is a popular open-source web server and servlet container that is widely used to deploy Java-based web applications. In this article, we will show you how to install and configure Apache Tomcat 9 on CentOS 8/7. Step 1: Install Java The first step to installing Apache Tomcat is to install Java. Tomcat requires a Java Development Kit (JDK) version 8 or later to be installed. You can check the installed Java version on your system by running the following command − java -version If Java is not installed on your system, you ...
Read MoreHow to Install and Configure Basic OpnSense Firewall?
OpnSense is an open-source, easy-to-use firewall platform that provides robust network security solutions. It is based on FreeBSD and offers a user-friendly web interface for configuring and managing firewall rules, NAT, VPN, and other network services. Prerequisites Before installing OpnSense, ensure you have − A dedicated computer or virtual machine with at least 2GB RAM and 8GB storage At least two network interfaces (WAN and LAN) A USB drive (4GB or larger) for installation media Basic understanding of networking concepts Installation Process Step 1: Download OpnSense ISO Download the latest stable OpnSense ...
Read More4 Useful Tips on mkdir, tar and kill Commands in Linux
As a Linux user, you will likely encounter situations where you need to create directories, compress files, or terminate processes. These tasks can be accomplished using three essential commands: mkdir, tar, and kill. In this article, we will discuss useful tips that will help you master these commands and simplify your Linux experience. mkdir Command The mkdir command is one of most commonly used commands in Linux. It allows users to create directories and subdirectories in the Linux file system. Creating Multiple Directories at Once The mkdir command can be used to create multiple directories at ...
Read MoreHow to Install and Configure Cloudera Manager on CentOS/RHEL 8?
Cloudera Manager is an enterprise-level software solution for managing Apache Hadoop clusters. It provides a web-based interface for deploying, configuring, and monitoring Hadoop clusters. Cloudera Manager is available in both open-source and enterprise editions. In this article, we will discuss how to install and configure Cloudera Manager on CentOS/RHEL 8. Prerequisites Before we proceed with installation, make sure that following prerequisites are met − A fresh installation of CentOS/RHEL 8 A user with sudo privileges Minimum 8GB RAM and 4 CPU cores At least 50GB free disk space A stable internet connection Step 1: ...
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