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Introduction SELinux, or Security-Enhanced Linux, is a security mechanism that is built into most modern Linux distributions, including CentOS 8. SELinux works by providing a set of mandatory access control policies that restrict access to various system resources and files. The purpose of this feature is to enhance the overall security of the system by limiting the scope of potential attacks. While SELinux is an effective tool for protecting your system, some users may want to disable it for various reasons. For instance, some applications may not work well with SELinux enabled, or it might be challenging to ... Read More
Introduction PhpMyAdmin is a popular open-source tool used to manage MySQL databases. It provides a web interface that allows users to interact with the database through their web browser. One of the default login options for PhpMyAdmin is root login access, which grants a user full administrative privileges over the entire database system. While root login access may be convenient for initial setup and configuration, it poses significant security risks. If an attacker gains access to your root credentials, they can cause irreparable damage to your database or steal sensitive information. Explanation of Root Login Access The root user account ... Read More
Introduction YUMDNF stands for Yellowdog Updater Modified - Dandified YUM, Next Generation. It is a package manager used in RHEL (Red Hat Enterprise Linux) and CentOS distributions to manage software packages installed on the system. Unlike the traditional YUM package manager, YUMDNF provides extensive improvements that enhance the overall functionality of this tool. Why disabling package updates may be necessary Disabling package updates may become necessary when you have an important application running on your system, and you don't want any changes to break it. In some cases, updates can cause compatibility issues with applications or dependencies that are critical ... Read More
The characters represent Roman numbers: 'I', 'V', 'X', 'L', 'C', 'D', and 'M'. We will be given a string that may contain another character also (all the characters will be uppercase English alphabets) and we have to find the largest Roman numerical number possible by altering the position of the characters of the given string, also if it is not possible to get one, then we will return invalid as the answer. Input 1 string str = “VICML” Output MCLVI Explanation In the given string we have M have the greater value followed by the C, and then all ... Read More
Introduction In the world of Linux, security is a top concern for system administrators. One way to enhance security on a Linux system is by using Security-Enhanced Linux (SELinux). SELinux is a mandatory access control (MAC) system that provides an additional layer of protection for your CentOS 7 server. It provides granular access controls and policies that enable system administrators to restrict users' actions and protect sensitive data. Checking the Current Status of SELinux SELinux (Security-Enhanced Linux) is a security mechanism that offers an additional layer of protection to your system by limiting the access of processes and users to ... Read More
Occam's razor, a principle named after the 14th-century English philosopher William of Ockham, serves as a guiding tool in various fields of knowledge, from philosophy to science. This principle suggests that among competing hypotheses or explanations, the simplest one is often the most accurate. By advocating for simplicity, Occam's razor encourages us to prioritize elegant and straightforward solutions over unnecessarily convoluted ones. Its application helps researchers, thinkers, and problem-solvers to navigate the intricacies of complex phenomena, unveiling a path toward clearer understanding and practicality. In this article, we explore the essence and significance of Occam's razor in simplifying the ... Read More
Feature selection is critical in the domains of machine learning and data analysis since it assists in identifying the most essential and informative features in a dataset. It is a procedure that seeks to extract relevant features that will help with analysis and modeling jobs. The branch and bound method is an effective feature selection tool. − As the volume of data grows at an exponential rate, it is becoming increasingly vital to build efficient algorithms capable of quickly identifying the ideal subset of attributes. In this post, we will look at feature selection and how the branch and bound method ... Read More
Excel is a robust spreadsheet tool that provides a number of functions and formulae to effectively handle and analyse data. We'll walk you through the procedures needed to complete this particular assignment in this lesson. Have you ever needed to use Excel to extract the name of the month from a date or a text string? Perhaps you want to display the month name based on a particular criterion and you have a column that comprises dates or text strings. In the case of this tutorial, if a cell starts with the number 1, you want to display "January" as ... Read More
Excel drop−down lists are powerful tools that allow users to select options from a predefined set of values. By adding an input message, you can provide additional instructions or information to the users when they interact with the drop−down list. In this tutorial, we will guide you through the step−by−step process of creating a drop−down list in Excel and adding a customized input message. Whether you're a beginner or an experienced Excel user, this tutorial is designed to help you enhance your spreadsheet skills and create more user−friendly data entry forms. By the end of this tutorial, you will learn ... Read More
Adding images to your Excel worksheets can be a fantastic way to improve them, whether you're doing reports, presentations, or just graphically organising your data. Although importing photographs from a file path is natively supported by Excel, doing so might be laborious and time−consuming if you need to display a lot of images. In this tutorial, we'll look at a method for quickly and easily showing many photographs from a variety of file directories in Excel. In order to automate the image presentation and help you save significant time and effort, we will make use of Excel's built−in capabilities, such ... Read More