Replace NAS OS with Ubuntu Desktop – Complete Guide for Home Server, Docker, ZFS, Samba, Backup

Replacing a NAS OS with Ubuntu Desktop: A Complete, Modern Home Server That Does Everything Better

Turn an ordinary PC into a powerful, flexible NAS and home server with Ubuntu Desktop, Docker, media streaming, backups, and secure remote access – step by step, magazine-style.

The Big Idea

Instead of using a dedicated NAS operating system, you install Ubuntu Desktop on a PC or mini PC and configure it as a full-featured NAS and home server. You keep all the classic NAS features – file sharing, redundancy, backups, media streaming – but gain the flexibility of a complete Linux desktop environment.

1. What a NAS Really Is (and What It Should Do)

A NAS (Network Attached Storage) is not magic hardware – it is simply a computer connected to your network, optimized for storage and services. At its core, a good NAS should provide:

• Centralized storage – all your important files in one place.
• Network sharing – via SMB (Windows), NFS (Linux), or WebDAV.
• Redundancy and data safety – RAID, snapshots, integrity checks.
• Extra services – media server, backup automation, personal cloud, remote access.

Ubuntu Desktop can do all of this – and more – using well-known, battle-tested components:

• Samba for SMB file sharing across Windows, macOS, and Linux.
• ZFS / Btrfs / mdadm RAID for redundancy and data integrity.
• Cockpit for a modern web-based admin dashboard.
• Docker for running apps like Plex, Jellyfin, Nextcloud, AdGuard Home, and more.

Useful Official Resources

• Ubuntu Desktop (LTS) – official download page
• Cockpit – web admin interface for Linux servers
• Samba – official documentation

2. Why Ubuntu Desktop Is a Strong Alternative to Traditional NAS OSes

Dedicated NAS systems like TrueNAS, Unraid, or vendor-specific solutions (Synology, QNAP) are great for plug-and-play file sharing. But as soon as you want more – Docker, advanced media servers, custom automation, flexible storage layouts – their limitations become obvious.

Ubuntu Desktop changes the game:

• A full operating system, not just a locked-down firmware.
• Any Linux application can be installed, not just what a plugin store allows.
• Modern graphical interface for configuration, debugging, and monitoring.
• Standard, well-tested updates with long-term support (LTS).
• Complete control over hardware – disks, network, GPU, virtualization.

Ubuntu Desktop vs. Ubuntu Server

Ubuntu Server is fantastic if you want to live entirely in the terminal. But for a first serious home NAS, Ubuntu Desktop offers a gentler learning curve: you see everything, you have windows, a browser, and GUI tools. Over time, you can move more and more into the terminal and automation, without losing the comfort of a desktop when you need it.

3. The Plan: Turning a PC into a Modern NAS with Ubuntu Desktop

In the rest of this article, we’ll treat this as a practical, step-by-step project. By the end, you’ll have:

• A PC or mini PC configured as a file server for your home.
• A NAS for media and backups, powered by Docker and modern apps.
• A flexible, extensible system that you control completely, without vendor lock-in.

4. Choosing the Hardware for an Ubuntu Desktop NAS

The good news: you don’t need a monster PC. For a home NAS or small personal server, something modest is enough:

• CPU: 2–4 cores (Intel or AMD) are fine to start.
• RAM: at least 8 GB, ideally 16 GB if you want Docker, Plex, or ZFS.
• Storage:
  • one small SSD (120–256 GB) for the operating system;
  • two or more HDDs/SSDs for data (RAID, ZFS, Btrfs, etc.).
• Network: gigabit Ethernet (2.5G if your network supports it).
• Case: decent airflow and space for multiple drives.

Practical Tip

If you already have an older PC, it might be more than enough for NAS duties. Invest your budget in reliable drives and a stable power supply rather than chasing high-end CPUs.

5. Backup First: Don’t Gamble with Your Data

If you’re reusing drives that already contain important data, your first step is non-negotiable: make a backup. Copy everything that matters to:

• an external hard drive;
• another PC;
• a cloud storage service (Google Drive, OneDrive, S3, etc.).

When you partition, create RAID arrays, or set up ZFS/Btrfs, a single mistake can wipe a drive. Backups are your safety net.

6. Downloading Ubuntu Desktop (LTS)

For a stable NAS, choose a Long Term Support (LTS) version of Ubuntu Desktop. LTS releases receive security and stability updates for years.

Open your browser and go to the official Ubuntu Desktop download page.

• Select the Desktop edition.
• Make sure you pick the latest LTS version.
• Save the .iso file to your PC.

7. Creating a Bootable USB Stick

You’ll need:

• a USB stick with at least 8 GB capacity;
• a tool to write the ISO image, for example:
  • Rufus (Windows) – search for “Rufus download”;
  • balenaEtcher (Windows / macOS / Linux) – search for “balenaEtcher download”.

General steps:

1. Download the Ubuntu Desktop ISO.
2. Open Rufus or balenaEtcher.
3. Select the ISO file and the USB stick.
4. Start writing the image to the USB drive.

8. Installing Ubuntu Desktop on Your NAS PC

1. Plug the bootable USB stick into the PC that will become your NAS.
2. Enter the BIOS/UEFI and set it to boot from USB.
3. On startup, choose “Install Ubuntu”.
4. Select your language.
5. Choose “Normal installation” and enable third-party software (drivers, codecs, etc.).
6. For partitioning:
   • use the small SSD for the system (you can let the installer handle it automatically);
   • leave the large data drives untouched – we’ll configure them later for ZFS/Btrfs/RAID.

Double-Check Your Target Drive

Make absolutely sure you select the correct drive for the OS installation. Any drive chosen for the system will be erased.

9. Initial Ubuntu Desktop Setup

After installation and the first boot:

• Create your main user (administrator).
• Open “Software Updater” or a terminal and run:

  sudo apt update && sudo apt upgrade

• Verify that you have internet connectivity.
• Ideally, configure a static IP for your server in your router (DHCP reservation), so it’s easy to find on your network.

10. Preparing Data Disks: ZFS, Btrfs, or Classic RAID

This is where the “NAS” part really begins. You have several options for combining your drives:

• ZFS – snapshots, scrubbing, protection against bit rot, very robust.
• Btrfs – flexible pooling, snapshots, compression.
• mdadm RAID – classic RAID 1/5/6/10, widely documented.

For advanced users, ZFS is excellent. For a simpler setup, Btrfs or mdadm-based RAID are great choices.

Example: RAID 1 with mdadm

1. Identify your drives:

   lsblk

2. Create a RAID 1 array:

   sudo mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb /dev/sdc

3. Format the RAID volume with ext4:

   sudo mkfs.ext4 /dev/md0

4. Mount the volume and add it to /etc/fstab for automatic mounting at boot.

Recommended Reading

• Search for “Ubuntu ZFS guide” for official ZFS on Ubuntu documentation.
• Search for “Ubuntu Btrfs RAID guide” for Btrfs configuration examples.

11. Installing Cockpit: A Web Dashboard for Your Server

Cockpit is a modern web interface for managing Linux servers: monitoring, disks, services, logs, networking, and more.

Install it with:

sudo apt install cockpit
sudo systemctl enable --now cockpit

Then, from another PC on your network, open a browser and go to: https://YOUR-SERVER-IP:9090.

Learn more on the official site: Cockpit Project.

12. File Shares with Samba (SMB)

To make your NAS visible to Windows, macOS, and Linux clients, you’ll use Samba for SMB file sharing.

Install Samba

sudo apt install samba

Basic Share Configuration

1. Create a directory for your share:

   sudo mkdir -p /srv/share
   sudo chown -R YOURUSER:YOURUSER /srv/share

2. Edit the Samba configuration:

   sudo nano /etc/samba/smb.conf

   Add at the end:

   [NAS-Share]
   path = /srv/share
   browseable = yes
   read only = no
   guest ok = no
   valid users = YOURUSER

3. Add a Samba password for your user:

   sudo smbpasswd -a YOURUSER

4. Restart Samba:

   sudo systemctl restart smbd

From Windows, you can now access the share at: \\YOUR-SERVER-IP\NAS-Share.

Advanced Samba Configuration

For more advanced setups (fine-grained permissions, guest access, domain integration), see the official Samba documentation.

13. Docker: Modern Apps Like on a “Pro” NAS

This is where Ubuntu Desktop clearly pulls ahead of many traditional NAS OSes. With Docker, you can run:

• Plex / Jellyfin – media servers;
• Nextcloud – your personal cloud;
• AdGuard Home / Pi-hole – DNS filtering and ad blocking;
• Photoprism / Immich – smart photo galleries;
• and countless other services.

Install Docker on Ubuntu

sudo apt install docker.io
sudo systemctl enable --now docker
sudo usermod -aG docker YOURUSER

Log out and back in so the docker group applies to your user.

For the official, up-to-date installation method, see Docker Engine on Ubuntu.

14. Media Server Example: Jellyfin in Docker

As a concrete example, let’s set up Jellyfin, an open-source media server, using Docker.

docker run -d \
  --name=jellyfin \
  -p 8096:8096 \
  -v /srv/media:/media \
  -v /srv/config/jellyfin:/config \
  --restart=unless-stopped \
  jellyfin/jellyfin

• /srv/media – the folder containing your movies and TV shows;
• /srv/config/jellyfin – Jellyfin’s configuration directory;
• Access Jellyfin in your browser at http://YOUR-SERVER-IP:8096.

For more details, visit the official site: Jellyfin.

15. Backup and Sync: Rclone, Syncthing, Snapshots

A NAS without backup is just a fancy hard drive. For real safety, combine local redundancy with off-site or multi-device sync:

• Rclone – backup to cloud providers (Google Drive, OneDrive, S3, etc.) – rclone.org
• Syncthing – peer-to-peer sync between multiple PCs – syncthing.net
• ZFS/Btrfs snapshots – if you chose these filesystems, you can create fast, space-efficient snapshots.

16. Remote Access: Your NAS, From Anywhere

To reach your NAS from outside your home network, you have several options:

• SSH – remote administration via terminal.
• VPN (WireGuard / OpenVPN) – secure access to your entire home network.
• Reverse proxy + HTTPS (Caddy, Nginx Proxy Manager) – for exposing web services like Jellyfin or Nextcloud.

Avoid exposing sensitive ports (SSH, Samba) directly to the internet. Use a VPN or a properly configured reverse proxy with authentication and valid HTTPS certificates.

17. Security and Maintenance: Keeping Your NAS Healthy

Good habits for a stable, secure Ubuntu Desktop NAS:

• Regular updates:

  sudo apt update && sudo apt upgrade

• Separate users for services, with minimal permissions.
• Strong passwords and, ideally, SSH key-based authentication.
• Firewall (ufw):

  sudo apt install ufw
  sudo ufw allow 22,80,443,445,9090/tcp
  sudo ufw enable

18. Why Many People Never Go Back to NAS OS After Ubuntu Desktop

When you put everything together, Ubuntu Desktop as a NAS gives you:

• All the classic NAS features – shares, RAID, snapshots, web dashboard.
• Far more flexibility in how you configure disks and services.
• The freedom to run any Linux application, without plugin store limitations.
• Full control over your system, with no vendor lock-in.

For anyone who wants a serious personal server – not just a basic file box – Ubuntu Desktop quickly becomes the logical choice.

Ready to Build Your Own Ubuntu Desktop NAS?

Bookmark this guide, come back whenever you want to add a new service (Docker apps, media, backups, personal cloud), and explore the rest of our deep-dive articles on home servers, security, and automation.

Next up, we recommend a dedicated guide on hardening your NAS and setting up a VPN for secure remote access, so your new Ubuntu Desktop server is not just powerful, but also safe.

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