Root Directory

From Linux Documentation Project Chapter 1. Linux Filesystem Hierarchy

To comply with the FSSTND the following directories, or symbolic links to directories, are required in /.


       /bin       Essential command binaries
       /boot      Static files of the boot loader
       /dev       Device files
       /etc       Host-specific system configuration
       /lib       Essential shared libraries and kernel modules
       /media     Mount point for removeable media
       /mnt       Mount point for mounting a filesystem temporarily
       /opt       Add-on application software packages
       /sbin      Essential system binaries
       /srv       Data for services provided by this system
       /tmp       Temporary files
       /usr       Secondary hierarchy
       /var       Variable data

The following directories, or symbolic links to directories, must be in /, if the corresponding subsystem is installed:


     / -- the root directory
     /home User home directories (optional)
     /lib<qual> Alternate format essential shared libraries
                      (optional)
     /root Home directory for the root user (optional)

Command tree

TREE(1)                     General Commands Manual                    TREE(1)

NAME
       tree - list contents of directories in a tree-like format.

SYNOPSIS
       tree  [-acdfghilnpqrstuvxACDFQNSUX]  [-L  level [-R]] [-H baseHREF] [-T
       title] [-o filename] [--nolinks] [-P pattern] [-I  pattern]  [--inodes]
       [--device] [--noreport] [--dirsfirst] [--version] [--help] [--filelimit
       #]  [--si]  [--prune]  [--du]  [--timefmt  format]  [--matchdirs]  [--]
       [directory ...]

DESCRIPTION
       Tree  is  a  recursive  directory listing program that produces a depth
       indented listing of files, which is  colorized  ala  dircolors  if  the
       LS_COLORS  environment  variable  is set and output is to tty.  With no
       arguments, tree lists the files in the current directory.  When  direc‐
       tory  arguments  are given, tree lists all the files and/or directories
       found in the given directories each in turn.  Upon completion of  list‐
       ing all files/directories found, tree returns the total number of files
       and/or directories listed.
...

pi@raspberrypi:~ $ cd /
pi@raspberrypi:/ $ tree -L 1
.
├── bin
├── boot
├── dev
├── etc
├── home
├── lib
├── lost+found
├── media
├── mnt
├── opt
├── proc
├── root
├── run
├── sbin
├── srv
├── sys
├── tmp
├── usr
└── var

19 directories, 0 files
pi@raspberrypi:/ $ cd
pi@raspberrypi:~ $