Linux Filesystem Hierarchy Explained for Beginners

In this article, we’ll explain the Linux Filesystem Hierarchy, what each folder means, and how to navigate it effectively.

📂 Linux Filesystem Hierarchy Explained

Here’s a breakdown of the most important Linux directories:

1./ (Root Directory)

The top-level directory of the entire Linux filesystem. Every other folder and file is stored inside this.
Examples: /home, /etc

2. /bin (Binary)

Contains essential user commands (executables) required for basic system operations.

Examples: cat, ls, cp, mv

3. /sbin (System Binary)

Holds system administration commands used by the root or sudo users.

Examples: fdisk, reboot

4. /etc (Configuration Files)

Stores system-wide configuration files for the OS and installed services.

• /etc/passwd → User accounts
• /etc/apt/sources.list → Ubuntu repositories

5. /dev (Devices)

Represents hardware devices as files.

• /dev/sda → Storage device
• /dev/tty → Terminal

6. /proc (Process Information)

A virtual filesystem with information about running processes and kernel parameters.

• /proc/meminfo → Memory usage
• /proc/cpuinfo → CPU details

7. /var (Variable Files)

Contains frequently changing data like logs, caches, and databases.

• /var/log → System logs
• /var/www/html → Web server files

8. /usr (User Programs)

Contains user-installed applications and utilities.

• /usr/bin → User binaries
• /usr/lib → Libraries

9. /tmp (Temporary Files)

Stores temporary files that are usually deleted after a reboot.

10. /home (User Directories)

Personal directories for each user in the system.
Example: /home/username

11. /boot (Boot Files)

Contains boot loader files needed to start the OS.

Examples: grub/

12. /lib (Libraries)

Holds essential shared libraries for /bin and /sbin.

13. /opt (Optional Software)

Used for third-party or optional software installations.

14. /mnt (Mount Point)

Temporary mount point for external or network file systems.

Examples: /mnt/usb, NFS mounts

15. /media (Removable Media)

Auto-mounts removable devices such as USBs and CDs.

16. /srv (Service Data)

Stores server-related data for services like FTP or websites.

17. /run (Runtime Data)

Holds runtime process data for the current session.

🖥️ Essential Linux Commands for Navigating the Filesystem

Now that you understand the structure, let’s look at some basic Linux commands to work with the filesystem.

• pwd → Print current working directory
• cd → Change directory
• ls → List files/folders
• mkdir → Create a new directory
• touch → Create an empty file
• cp → Copy files/folders
• mv → Move or rename files/folders
• rm → Remove files/folders
• rmdir → Remove an empty directory
• cat → Display file content
• less / more → View file content page-by-page
• vi / vim → Edit files in a text editor
• df → Show disk space usage
• du → Check directory size

Conclusion

The Linux Filesystem Hierarchy is the foundation of every Linux-based operating system. By understanding what each directory does, you’ll be able to navigate Linux with confidence, manage servers, troubleshoot issues, and work like a true IT professional.

👉 Start practicing these commands today and explore the filesystem to become more comfortable with Linux.

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