Offensive Security Kali 101 is a beginner-level training course focused on introducing users to Kali Linux, a penetration testing distribution. The course consists of 21 classes delivered through 54 minutes of video tutorials, divided into three main sections: Getting Started, Basic Configuration, and Tools Overview. The Getting Started section covers an overview of Kali Linux and its use cases, along with step-by-step instructions for installing Kali using VMware. The Basic Configuration section teaches network adapter configuration, network settings for penetration testing environments, changing default passwords, hostname modification, IP address management, DNS troubleshooting, and managing services including Apache, SSH, and MySQL within Kali Linux. The Tools Overview section introduces various categories of tools available in Kali Linux, including vulnerability analysis tools, information gathering tools, web application tools, password attack tools, and exploitation frameworks. Specific tools covered include Maltego for information gathering, Burp Suite for web application testing, and Armitage for exploitation. The course also provides an overview of the top 10 security tools available in the distribution. Upon completion, students receive a certificate of achievement. The course is designed for individuals beginning their journey in cybersecurity-related work and penetration testing.