This is part 5 of Ethical Hacking For Beginners Course. In this part you will learn about Kali and RedHat Linux OS.

Linux is one of popular version of UNIX operating System. It is open source as its source code is freely available. It is free to use. Linux was designed considering UNIX compatibility. Its functionality list is quite similar to that of UNIX.

Components of Linux System

Linux Operating System has primarily three components

• Kernel − Kernel is the core part of Linux. It is responsible for all major activities of this operating system. It consists of various modules and it interacts directly with the underlying hardware. Kernel provides the required abstraction to hide low level hardware details to system or application programs.

• System Library − System libraries are special functions or programs using which application programs or system utilities accesses Kernel's features. These libraries implement most of the functionalities of the operating system and do not requires kernel module's code access rights.

• System Utility − System Utility programs are responsible to do specialized, individual level tasks.

  
  

Security Professionals follow four key protocol concepts:

1. Stay legal: Obtain proper approval before accessing and performing a security assessment.

2. Define the scope: Determine the scope of the assessment so that the ethical hacker’s work remains legal and within the organization’s approved boundaries.

3. Report vulnerabilities: Notify the organization of all vulnerabilities discovered during the assessment. Provide remediation advice for resolving these vulnerabilities.

4. Respect data sensitivity: Depending on the data sensitivity, ethical hackers may have to agree to a non-disclosure agreement, in addition to other terms and conditions required by the assessed organization.