What is kernel?

The kernel connects programs and data processing at the hardware level through inter-process communication and system calls. The kernel is loaded first when an operating system is loaded and remains in memory until the operating system is shut down.

Is Linux an operating system or a kernel?

Linux is a kernel, not an operating system. The Linux kernel was created by Linus Torvalds in 1991 and serves as the core component of various operating systems. The Linux kernel provides the essential functionalities and low-level system services required for an operating system to function, such as process management, memory management, device drivers, and networking.

Is Linux Operating System Immune to Malware?

Linux operating systems are not completely immune to malware, but they are generally considered to be more secure compared to other operating systems like Windows. Here are some reasons why:

 1. Strong security focus: Linux was designed with a focus on security and stability. Many experts and developers actively review the source code, identifying and fixing security vulnerabilities promptly.

 2. Permission system: Linux has a robust permission system that limits users' access to critical system files and directories. By default, regular users have limited privileges, preventing them from making changes that could harm the system. 

 3. Package management: Linux distributions use package management systems that provide a secure way to install and update software. These systems verify the authenticity of software sources, reducing the risk of installing malicious software. 

 4. Smaller target audience: Windows is the most widely used operating system, making it a prime target for malware creators. Linux has a smaller market share on desktop computers, making it a less attractive target. However, this doesn't mean Linux is invulnerable.

 5. Rapid response to vulnerabilities: The open-source nature of Linux allows for quick discovery and patching of security vulnerabilities. The Linux community actively addresses security issues and releases updates promptly.