Linux OS Family Learning Path

Linux definition and Linux kernel role

Linux is a family of free and open-source, Unix-like operating systems built on the Linux kernel. First released in 1991 by Linus Torvalds, Linux systems are often distributed as “Linux distributions” (distros), which package the kernel together with supporting system software and libraries (commonly from projects such as GNU, Red Hat, and X.Org). Not every Linux-based system is a distro—for example, Android is Linux-kernel-based but is not typically treated as a traditional distribution. The Linux kernel is the core component that manages the computer’s hardware and provides the essential services applications need through a system call interface. It handles fundamental tasks such as process scheduling, memory management, networking, and device interaction, forming the boundary between user programs (user space) and privileged hardware control (kernel space). Because the kernel and many related components are open source, the Linux ecosystem supports broad collaboration and allows developers to modify and redistribute software under licenses such as the GPLv2.

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Linux distributions and what makes a distro

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