Understanding What Linux Is

What is the "kernel" of Linux, aka the "Linux kernel"?

It's the thing that interacts with the hardware of your machine. It is a file.
Learn more: https://www.reddit.com/r/linux4noobs/comments/65bmwd/can_someone_eli5_the_linux_kernel/

What happens when I delete files on Linux? (In Windows, they go to a recycle bin, then you delete them from there, and sometimes they're still recoverable after that.)
https://unix.stackexchange.com/questions/10883/where-do-files-go-when-the-rm-command-is-issued


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