Testing and Inspection

Nessus

Nessus is a widely-used vulnerability scanner developed by Tenable that identifies security weaknesses, misconfigurations, and compliance issues in networks, systems, and applications. It performs automated scans to detect vulnerabilities such as missing patches, default passwords, and open ports, generating detailed reports with risk assessments and remediation guidance. Primarily used by security professionals, it helps organizations proactively manage and mitigate security risks in IT environments.

Also known as: Tenable Nessus, Nessus Scanner, Nessus Professional, Nessus Essentials, Nessus Vulnerability Scanner

🧊Why learn Nessus?

Developers and security teams should learn Nessus to integrate vulnerability management into DevOps pipelines (DevSecOps), ensuring applications and infrastructure are secure before deployment. It is essential for roles like penetration testers, security analysts, and system administrators to conduct regular security assessments, meet compliance standards (e.g., PCI DSS, HIPAA), and prioritize fixes based on severity scores. Use cases include pre-production scanning, incident response investigations, and auditing cloud or on-premises assets for vulnerabilities.

See how it ranks →

Compare Nessus

Nessus vs Openvas→Nessus vs Qualys→Nessus vs Nexpose→

Learning Resources

Nessus Documentation

Nessus Fundamentals Course on Tenable University

Nessus Tutorial for Beginners on YouTube

Mastering Nessus for Penetration Testing Book

Related Tools

Vulnerability Management Penetration Testing Network Security Compliance Auditing Devsecops

Alternatives to Nessus

Openvas Qualys Nexpose

Other Testing and Inspection

.env is a file format and tool used to store environment variables, which are key-value pairs that configure application settings like API keys, database URLs, and other sensitive or environment-specific data. It allows developers to separate configuration from code, making applications more secure and portable across different environments (e.g., development, testing, production). Tools like dotenv in Node.js or python-dotenv in Python parse .env files to load these variables into the application's environment at runtime.

.htaccess (Hypertext Access) is a configuration file used on Apache web servers to control directory-level settings, such as URL redirection, access control, and performance optimizations. It allows developers to override global server configurations for specific directories without modifying the main server configuration files. This file is commonly used for tasks like enabling HTTPS, blocking IP addresses, or setting custom error pages.

2D Drafting is the process of creating technical drawings and schematics in two dimensions using specialized software, primarily for engineering, architecture, and manufacturing design. It involves producing precise, scaled representations of objects, components, or structures with detailed annotations, dimensions, and symbols to communicate design intent and specifications. This skill is foundational for translating conceptual ideas into actionable plans for construction, fabrication, or analysis.

2D Drafting Tools

2D drafting tools are software applications used to create precise technical drawings, schematics, and blueprints in two dimensions. They enable engineers, architects, and designers to produce detailed plans with accurate measurements, annotations, and geometric shapes. These tools are essential for documenting designs before moving to 3D modeling or physical construction.

2D Drawing Review

2D Drawing Review refers to the process and software tools used to examine, annotate, and collaborate on two-dimensional technical drawings, such as blueprints, schematics, or CAD designs. It involves checking for accuracy, compliance with standards, and identifying errors or improvements in engineering, architecture, or manufacturing contexts. Tools for this purpose often include features like markup, version control, and real-time collaboration to streamline review cycles.

2D Graphics Software

2D graphics software refers to computer programs used to create, edit, and manipulate two-dimensional digital images, illustrations, and designs. These tools provide features like drawing, painting, vector graphics, image editing, and layout design for applications such as digital art, UI/UX design, game sprites, and print media. They range from professional suites like Adobe Photoshop to free alternatives like GIMP and Inkscape.