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Course 27 - Hacking Web Applications, Penetration Testing, CTF | Episode 2: Linux Fundamentals and Command Injection Basics
In this lesson, you’ll learn about:
You can listen and download our episodes for free on more than 10 different platforms:
https://linktr.ee/cybercode_academy
- Linux operating system fundamentals, including its architecture and why command-line proficiency is critical for cybersecurity tasks such as vulnerability discovery and command injection testing.
- File System Hierarchy Standard (FHS) structure, understanding key root directories like /etc (configuration), /bin (essential binaries), /home (user data), and /var (logs and variable data), along with the difference between absolute vs. relative paths.
- Core file and directory management commands, including:
- ls (listing files, including hidden files)
- cd (navigating directories)
- pwd (printing the working directory)
- cp, mv, and rm (copying, moving, and deleting files)
- Searching and filtering techniques, using:
- find (searching by name, type, or permissions)
- grep (matching strings inside files)
- locate (database-based file indexing)
- User identity and privilege management, including:
- whoami (current user identification)
- su (switching users)
- sudo (executing commands with elevated privileges)
- Process monitoring and control, such as:
- ps -aux (viewing active processes)
- kill and killall (terminating processes)
- Understanding signals like SIGTERM (15) for graceful shutdown and SIGKILL (9) for forced termination
- Command control operators, learning how to chain and manipulate commands using:
- ; (sequential execution)
- && (execute if previous succeeds)
- || (execute if previous fails)
- | (piping output between commands)
- Practical lab application, applying navigation, command chaining, and operator behavior to understand how improperly validated input can lead to command injection vulnerabilities in real-world systems.
You can listen and download our episodes for free on more than 10 different platforms:
https://linktr.ee/cybercode_academy
View all episodes
By CyberCode AcademyIn this lesson, you’ll learn about:
You can listen and download our episodes for free on more than 10 different platforms:
https://linktr.ee/cybercode_academy
- Linux operating system fundamentals, including its architecture and why command-line proficiency is critical for cybersecurity tasks such as vulnerability discovery and command injection testing.
- File System Hierarchy Standard (FHS) structure, understanding key root directories like /etc (configuration), /bin (essential binaries), /home (user data), and /var (logs and variable data), along with the difference between absolute vs. relative paths.
- Core file and directory management commands, including:
- ls (listing files, including hidden files)
- cd (navigating directories)
- pwd (printing the working directory)
- cp, mv, and rm (copying, moving, and deleting files)
- Searching and filtering techniques, using:
- find (searching by name, type, or permissions)
- grep (matching strings inside files)
- locate (database-based file indexing)
- User identity and privilege management, including:
- whoami (current user identification)
- su (switching users)
- sudo (executing commands with elevated privileges)
- Process monitoring and control, such as:
- ps -aux (viewing active processes)
- kill and killall (terminating processes)
- Understanding signals like SIGTERM (15) for graceful shutdown and SIGKILL (9) for forced termination
- Command control operators, learning how to chain and manipulate commands using:
- ; (sequential execution)
- && (execute if previous succeeds)
- || (execute if previous fails)
- | (piping output between commands)
- Practical lab application, applying navigation, command chaining, and operator behavior to understand how improperly validated input can lead to command injection vulnerabilities in real-world systems.
You can listen and download our episodes for free on more than 10 different platforms:
https://linktr.ee/cybercode_academy