- Linux is an operating system where you can run apps, manage files, browse the internet, and do everything. But Linux itself is only the kernel, not the complete OS.
- It is free and open source, which means any user can install Linux without paying anything.
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In Linux, you don’t need extensions like
.txtor.exeto save or open files, but proper permissions are required. In other operating systems, extensions help recognize and run files. - When you start Linux, the system first runs a process with PID = 1, which starts and controls all other processes (apps, services, background tasks) to keep Linux running properly.
