this post was submitted on 14 Oct 2023
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Linux
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From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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Since I think the answer is pretty much complete I just want to link you a tutorial/article giving a short overview and introduction:
https://www.pluralsight.com/blog/it-ops/linux-file-permissions
One more thing, always remember that for Linux everything is a file (a path, a program and well a file like an image) therefore everything can be restricted with this.