Linux is the same as freedom
There is a need to have the definition of an open source as equivalent to Linux. There are a set of principles that any software follows, such as:
•	For any of your modified software, copies will have no restrictions
•	The software distribution will have no limit
•	There will be permission to make any changes needed by you, examine it, as well as study and disassemble the software
•	Irrespective of your goals or motive for running it, the full freedom to run the software
Primarily, open-source software does not correlate to a community, and you need to understand that. Linux is built by this community, and Linux enjoys robust maintenance from that community. As such, people made Linux as software for the rest of the world, if you are wondering what Linux is and what has brought about the popularity of Linux. It is all about this philosophy of open source.