nix-config/help/gnu_linux.md

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# The GNU/Linux System
This file holds information about GNU/Linux in general.
## Root file structure
```
/ # Root directory
/bin # Binaries for global commands (ls, cat, etc.)
/boot # Boot loader files (grub, the linux kernel, etc.)
/dev # "Device files" (/dev/null, /dev/random, etc.)
/etc # System-wide configuration files
/home # Saved files and personal settings of each user
/lib # Libraries used by the binaries in /bin
/lib64 # 64-bit libraries
/mnt # Temporarily mounted filesystems reside here
/opt # Applications that don't rely on other dependencies
/proc # Provides process and kernel information as files
/root # Home directory for the root user
/run # Information about the running system since last boot
/sbin # System binaries (fsck, init, route, etc.)
/srv # Site-specific data served by the system
/sys # Contains information about the system
/tmp # Temporary files used for processes
/usr # Applications that rely on other dependencies
/var # Variable files that are supposed to change over time
```