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Linux Directory Structure - FHS
(lemm.ee)
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this post was submitted on 06 Sep 2024
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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).
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What's the reason?
/run is a temporary fs, so if the mount, filesystem or even the entire system crashed, all the mounted data will be cleaned up after a reboot.
On the contrary, if the mount crashed, it might leave a folder or data on /media, making subsequent mount problematic.
Here is a well-written comment about the rationale behind this mount point: https://www.reddit.com/r/linuxquestions/comments/tzo984/comment/i40e2za/
Probably so that you don't accidentally write to a directory by mistake when it isn't mounted, and then lose access when you mount something over it, all while services are looking for files that are only there sometimes.
I've had exactly this happen to me. It was my own fault but it took a bit of work figure out.