#Ubuntu Linux

The article explains the process of adding application icons to the desktop in Ubuntu Linux, a task which is not straightforward. This is achieved by locating the .desktop file for the desired application in specific directories and then copying it to the "Desktop" folder in the Home directory. Once pasted, users must grant launching permissions to allow the icon to function.

The article outlines how to obtain a unique user ID (UID) on Ubuntu Linux. UID can efficiently track and manage users on a multi-user system. The 'id' command provides a user's UID, while 'lslogins -u' lists all system users' IDs, and the 'getent passwd' command displays a user's UID by reading /etc/passwd.

The article outlines the process of checking system RAM on Ubuntu Linux, which can be advantageous while specifying system requirements. Various tools can be used for this task from the System Settings panel or through terminal commands such as 'free', 'watch', 'top', and 'dmidecode'. These tools not only reveal RAM size and usage but also type and speed.

This article provides a guide on removing users from groups in Ubuntu Linux. The article explains that each account on Ubuntu Linux belongs to one or more primary or secondary groups. Removing a user from a group is done using the 'deluser' command. If needed, the primary group of an account can be changed using the 'usermod' command. To check the group of a user, the 'groups' command is used.

This article provides a guide for adding users to groups in Ubuntu Linux, a function that helps regulate account access to resources. It distinguishes between primary and secondary groups, with a new account automatically joining the corresponding primary group. The text also specifies how to add a user to a group, change a user's primary group, and lists all groups in Ubuntu Linux.

This article provides step-by-step instructions on installing and using the Nessus vulnerability scanner on Ubuntu Linux. Nessus, an open-source tool for vulnerability assessment and penetration testing, uses the CVE architecture and can be installed on various platforms. The article details the download and install process of Nessus DEB package and how to launch and manage Nessus services. It also gives instructions on setting up the Ubuntu firewall and accessing the Nessus web portal.

The article details the process to install Microsoft .NET 7 on Ubuntu Linux. Microsoft's .NET 7 has improved Linux and ARM64 support, enhances app performance, and introduces new features. While .NET 6 packages are already in Ubuntu's default repositories, .NET 7 packages will need the official Microsoft .NET repository for installation. The article provides step-by-step commands for this process.

This text explains how to install and use Nexus Repository Manager on Ubuntu Linux, a system beneficial for managing application binaries and build artifacts. The process includes instructions for installing Java OpenJDK and JRE v8, downloading and extracting the Nexus package, creating a Nexus user account, configuring the system to run Nexus, and setting up a reverse proxy server.

The article provides a detailed guide on installing and using the MEAN stack on Ubuntu Linux. The MEAN stack, comprising MongoDB, Express, Angular, and Node, offers a standardized, efficient framework for Java-based website and application development. The guide covers the installation processes of MongoDB, Node.js, and the MEAN stack itself, before highlighting how to create a Node.js web app and run it with a reverse proxy for efficiency.

The article provides detailed instructions on installing and using ModSecurity with Apache on Ubuntu Linux. ModSec, an open-source web application firewall, was initially a module on Apache but now supports multiple servers, with advanced performance on Apache. The guide covers installation, configuration, rule modification for preventive actions, and application of OWASP ModSecurity rules.