Linux is an operating system where you can run applications, manage files, browse the internet, and perform many other tasks. However, Linux itself is only the kernel, not the complete operating system. Linux is free and open source, which means anyone can install and use it without paying any cost. In Linux, you do not need file extensions such as .txt or .exe to save or open files, but the required file permissions must be set. In other operating systems, file extensions help identify and run files.
When Linux starts, the system first runs a process with PID = 1. This process starts and manages all other processes (applications, services, and background tasks) to keep the system running properly.
Key Features of Linux:
Linux is one of the most popular operating systems that provides many features, safety, and security. For this reason, many users and organizations use this system. Preventing unauthorized access and protecting the system from security threats are important security features of Linux, which make users prefer it. Another reason is that Linux is open source, so any user, whether they have money or not, can use it. It also provides a multiuser and multitasking system.
The following are the key features of Linux:
- Free and Open Source
- Multiuser Support
- Multitasking Support
- High Security
- Stable Operating System
- Highly Customizable
- Portability
- Powerful Command-Line Interface (CLI)
- Wide Hardware Support
- High Performance
