Security

Protecting systems, data, and applications from threats and vulnerabilities.
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Fundamentals of Software Security


Diagram showing software security fundamentals including threats, vulnerabilities, authentication, authorization, encryption, and secure development practices.

Software security fundamentals: threats, vulnerabilities, and defenses. Build systems that protect data and users from attacks.

How to Use Multiple GitHub Accounts on the Same Computer: Complete Guide


Learn how to manage multiple GitHub accounts on one computer using SSH keys. Includes step-by-step instructions, shell functions, and best practices for macOS.

How to Fix SSH Key Permission Denied (publickey) Error: Complete Guide


Learn how to fix the 'Permission denied (publickey)' SSH error by properly setting SSH key permissions on Windows and Linux systems. Includes step-by-step instructions, troubleshooting tips, and security best practices.