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Articles by Satish Kumar
Page 34 of 94
How to Find All Failed SSH login Attempts in Linux?
As a Linux system administrator, monitoring failed SSH login attempts is crucial for maintaining system security. SSH (Secure Shell) is the primary method for remote access to Linux systems, making it a common target for attackers. Every SSH login attempt, whether successful or failed, is recorded in system logs, providing valuable security intelligence. Failed SSH login attempts often indicate brute-force attacks, where attackers use automated scripts to guess passwords, or compromised user accounts. By analyzing these logs regularly, you can identify unauthorized access attempts and implement protective measures before a breach occurs. Understanding SSH Login Logs SSH ...
Read MoreImplement shell file protection in Linux
Shell file protection in Linux provides multiple layers of security to prevent accidental file overwrites and unauthorized access. This includes both filesystem permissions and built-in shell safeguards like the noclobber option that prevents redirection operators from overwriting existing files. Besides the Linux file permission mechanisms that help us keep our files safe from misuse, most Linux shells have built-in safeguards against accidental file overwrite. We'll cover the key protection mechanisms available in common shells. Protecting Files With noclobber All POSIX shell implementations support the noclobber option. When enabled, the shell prevents output redirection operators from overwriting existing ...
Read More20 Things to Do After Installing Ubuntu 22.04 LTS (Focal Fossa)
Ubuntu 22.04 LTS (Jammy Jellyfish) is the latest long-term support release of Ubuntu, which means that it will be supported for five years with security updates and bug fixes. If you have just installed Ubuntu 22.04 LTS, congratulations! You are now ready to explore the world of Ubuntu and take advantage of its many features and tools. In this article, we will discuss 20 essential things you can do after installing Ubuntu 22.04 LTS to optimize your new operating system. These include updating your system, customizing your desktop, installing essential software, configuring security settings, and more. 1. Update ...
Read MoreHow To Enable Desktop Sharing In Ubuntu and Linux Mint?
Desktop sharing or remote desktop access allows you to control and view another computer's desktop from your own system. This feature is particularly useful for providing technical support, remote work, or accessing files from another machine. Ubuntu and Linux Mint both include built-in desktop sharing capabilities through the Vino VNC server. Enabling Desktop Sharing in Ubuntu Ubuntu includes Vino, a VNC server that enables desktop sharing over your local network. Follow these steps to enable it: Step-by-Step Setup Step 1 − Open Settings from the Activities overview or press Super key and search for "Settings". ...
Read MoreHow to Find and Install Software Applications in Fedora Linux?
Fedora Linux is a cutting-edge distribution known for its frequent updates, robust security, and modern features. Developed by the community-supported Fedora Project and sponsored by Red Hat, Fedora uses a sophisticated package management system that allows users to install and update software from official repositories and third-party sources, making it a powerful platform for developers and IT professionals. Unlike traditional app stores, Fedora's package management approach provides greater flexibility, security, and control over software installation while maintaining system integrity through dependency management and automated updates. Finding Software Applications in Fedora Linux Using DNF Package Manager to Search ...
Read MoreDifference Between .a and .so files
A programmer may want to write three different programs. However, he realizes that some of the functionality needed for each program could be shared among them. Therefore, he decides to create a library containing these shared features. A library is basically a collection of code and data that other people can use. On Linux, archives (with the .a file extension) contain compiled object code, whereas shared objects (.so files) contain code that can be dynamically loaded at runtime. Here, we'll examine how software runs under Linux and the purposes of the library and archive files. We'll also see ...
Read More20 Things To Do After Installing Ubuntu 22.10 'Groovy Gorilla'
Ubuntu 22.10 'Kinetic Kudu' brings exciting features and improvements to the Linux desktop experience. After installation, there are essential configurations and applications to install that will optimize your system and enhance productivity. This guide covers 20 important steps to get the most out of your fresh Ubuntu installation. 1. Install System Updates The first priority is updating your system to ensure you have the latest security patches, bug fixes, and feature improvements. Open the Software Updater application or use the terminal − sudo apt update && sudo apt upgrade 2. Install Additional Hardware Drivers ...
Read MoreHow to Enable HTTP2.0 in Apache on Ubuntu?
HTTP/2.0 is the latest version of the HTTP protocol that offers significant performance improvements over its predecessor, HTTP/1.1. Enabling HTTP/2.0 on your Apache web server can enhance the speed and responsiveness of your website, resulting in a better user experience for your visitors. In this article, we will guide you through the steps to enable HTTP/2.0 on Apache on Ubuntu. Prerequisites Before enabling HTTP/2.0, ensure your system meets these requirements: Apache version 2.4.17 or later with HTTP/2 support SSL/TLS certificate installed (HTTP/2.0 requires HTTPS) Ubuntu server with root or sudo privileges Step 1: Check ...
Read MoreDelete expoted environment Variable in Linux shell
This article explains how to delete an exported environment variable from the Linux shell. Environment variables are key-value pairs that store system and user configuration information accessible to all processes running in the system. Understanding Environment Variables An environment variable is a named storage location that contains data used by the operating system and applications. When a variable is exported, it becomes available to child processes spawned from the current shell. These variables are stored in the process's memory space and can be accessed programmatically using functions like getenv() in C. Listing Exported Variables Before deleting ...
Read MoreHow to Find Apache Document Root in Linux?
Apache Document Root is the folder where all files accessible via the web server are stored. It serves as the main directory containing HTML, CSS, PHP, JavaScript, and other web files. When a user requests a website, Apache searches for the requested resource in this document root directory and sends the file content back to the browser. Understanding how to locate the document root is essential for system administrators and developers who need to configure, troubleshoot, or manage Apache servers effectively. Importance of Finding Apache Document Root Knowing the Apache document root location provides several key benefits ...
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