Ubuntu Download and Installation Guide

By Kokil Thapa | Last reviewed: September 2026

You need a reliable Ubuntu Download and Installation Guide when a fresh VPS, an old laptop, or a new dev machine lands on your desk. Ubuntu 24.04 LTS is the practical default for most web stacks in 2026. It ships with long-term support, strong package availability, and a huge community. This walkthrough covers ISO selection, verified downloads, bootable media, and a clean install path for both desktop and server roles. If you run production PHP or Laravel workloads, pair this with our Linux system administration service once the base OS is live.

Which Ubuntu edition should you download for your use case?

Canonical publishes several Ubuntu flavours each release cycle. Picking the wrong one wastes time before you even reach the installer. For most developers and small teams, one of three builds covers nearly every scenario.

Ubuntu Desktop 24.04 LTS includes the GNOME shell, LibreOffice, Firefox, and everyday utilities. Choose it for local development, design work, or a daily-driver machine. Ubuntu Server 24.04 LTS has no GUI by default. It fits VPS hosting, Docker hosts, database servers, and CI runners. Ubuntu Pro extends security maintenance on top of standard LTS images; it matters for compliance-heavy production, not for a home lab.

LTS releases receive five years of standard support. Interim releases like 24.10 arrive every six months but drop off support quickly. On client projects I maintain on shared EC2 infrastructure, I stay on 22.04 or 24.04 LTS and upgrade deliberately. Jumping to non-LTS builds on production web servers is rarely worth the churn.

New projects in 2026 should start on 24.04 LTS unless a host only offers 22.04. Both run PHP 8.3 and PHP 8.4 comfortably through standard repositories or Ondřej Surý PPA. For a deeper desktop tour after install, see our Ubuntu desktop complete guide.

How do you download Ubuntu safely and verify the ISO?

Always pull images from the official Canonical source. Third-party mirrors can be fine, but the primary download page is the safest starting point. Visit ubuntu.com/download and select Desktop or Server. The current LTS line is 24.04.2, published as point releases that bundle post-release fixes into the ISO itself.

Download steps

1. Open the official Ubuntu download page and pick your edition.
2. Select the 64-bit PC (AMD64) image unless you target ARM hardware explicitly.
3. Save the .iso file to a known folder such as ~/Downloads.
4. Copy the published SHA256 checksum from the same page.
5. Run a local hash check before you flash any USB stick.

On Linux or macOS, verify with sha256sum. On Windows, use PowerShell:

# Linux / macOS
sha256sum ~/Downloads/ubuntu-24.04.2-desktop-amd64.iso

# Windows PowerShell
Get-FileHash -Algorithm SHA256 .\ubuntu-24.04.2-desktop-amd64.iso

The output must match the checksum on the download page character for character. A mismatch means a corrupted download or a tampered file. Delete the ISO and download again. I treat checksum verification as non-negotiable on every production server image I prepare.

For server installs on cloud providers, you often skip USB entirely. AWS, DigitalOcean, Hetzner, and Nepali VPS hosts expose Ubuntu 24.04 as a one-click template. You still benefit from knowing the manual install path when bare-metal or custom partitioning is required. Our Ubuntu installation guide for beginners covers overlapping ground with extra screenshots for first-time users.

How do you create a bootable USB drive for Ubuntu?

You need a USB flash drive with at least 8 GB free space. Back up anything on that drive first; the flashing process wipes all existing data. The goal is a UEFI-compatible boot stick that your machine recognises at power-on.

Option A — Rufus on Windows

1. Download Rufus from the official site and launch it.
2. Select your USB device under Device.
3. Click Select and point to the Ubuntu ISO file.
4. Partition scheme: GPT. Target system: UEFI (non CSM).
5. Leave File system as FAT32. Click Start and confirm the wipe prompt.

Option B — dd on Linux

Identify the block device carefully. /dev/sdb is an example only; yours may differ.

# List disks — note the correct /dev/sdX
lsblk

# Flash ISO (replace sdX with your USB device)
sudo dd if=~/Downloads/ubuntu-24.04.2-desktop-amd64.iso of=/dev/sdX bs=4M status=progress conv=fsync

Wrong target disk with dd destroys data permanently. Double-check with lsblk before you run the command. On macOS, use diskutil list and sudo dd with /dev/rdiskN for faster writes.

Option C — Startup Disk Creator on Ubuntu

If you already run Ubuntu, open Startup Disk Creator from the app menu. Choose the ISO, select the USB drive, and click Make Startup Disk. It handles formatting and bootloader setup automatically.

How do you install Ubuntu Desktop step by step?

Insert the USB drive and power on the target machine. Press F2, F12, Del, or Esc depending on the manufacturer to open the boot menu. Select the UEFI USB entry. The Ubuntu live environment loads within a minute on modern hardware.

Installer walkthrough

1. Choose your language and keyboard layout on the welcome screen.
2. Select Normal installation for a full desktop, or Minimal for fewer preinstalled apps.
3. Check Download updates while installing if you have a stable internet connection.
4. Install third-party software for graphics and Wi-Fi when prompted.
5. Pick installation type: Erase disk for a dedicated machine, or Something else for dual-boot.
6. Confirm timezone — Kathmandu maps to Asia/Kathmandu.
7. Create your user account with a strong password. Use the password generator tool if you need entropy fast.
8. Wait for file copy and bootloader setup to finish, then reboot and remove the USB.

Dual-boot with Windows demands manual partitioning. Shrink the NTFS volume in Windows Disk Management first. Leave at least 30 GB for a comfortable Ubuntu desktop install. In the Something else view, mount the free space as ext4 with mount point /. Add a 2–4 GB swap file or swap partition if RAM is 8 GB or less.

After first login, run updates immediately:

sudo apt update && sudo apt upgrade -y
sudo reboot

That single command closes the gap between ISO build date and current package versions. Skipping it leaves known security patches unapplied from day one. For ongoing patch discipline, read our Ubuntu security updates guide.

How do you install Ubuntu Server on a VPS or bare metal?

Server installation follows the same ISO but presents a text-based interface called Subiquity. Cloud images from your provider skip USB entirely; you SSH in as root or ubuntu and harden from there. Bare-metal and homelab installs use the Server ISO directly.

Server installer highlights

• Language and keyboard selection appear first, same as desktop.
• Network configuration supports DHCP by default; static IP setup is available for servers.
• Storage layout offers guided LVM or custom partitioning for separate /var or /home mounts.
• Profile setup creates a non-root sudo user — never run daily tasks as root.
• OpenSSH server installation is a checkbox; enable it for remote headless management.
• Snaps for Docker, microk8s, or LAMP appear as optional post-install bundles.

A minimal web-server partition scheme I use on Laravel VPS hosts looks like this:

/boot/efi   512 MB   EFI System Partition
/           30 GB    ext4   root + applications
/var        20 GB    ext4   logs, MySQL data, uploads
swap        4 GB     swap   equal to RAM up to 8 GB

After reboot, SSH in and run the first-hour hardening pass. Our initial Ubuntu server setup guide covers SSH keys, UFW, and fail2ban in one sitting. Sites I deploy with Deployer 7 and GitLab CI on shared EC2 infrastructure all start from this same baseline.

Stack assembly guides on this site walk each layer in detail. Start with LEMP stack setup on Ubuntu, then install PHP on Ubuntu, and finish with Laravel deployment on Ubuntu VPS. For sister legal-tech sites on the same pipeline, see the Notary Kathmandu portfolio entry.

What should you configure immediately after installing Ubuntu?

Installation is half the job. The first hour defines whether your system stays secure and maintainable. Treat post-install as a checklist, not an optional cleanup pass.

Essential post-install tasks

1. Apply all package updates with apt update && apt upgrade.
2. Create an SSH key pair on your workstation and copy the public key to ~/.ssh/authorized_keys.
3. Disable password SSH login once key auth works.
4. Enable UFW and allow only ports 22, 80, and 443 for web servers.
5. Set timezone with sudo timedatectl set-timezone Asia/Kathmandu on Nepal-based hosts.
6. Configure automatic security updates via unattended-upgrades.
7. Install fail2ban to throttle brute-force SSH attempts.

Quick UFW baseline for a public web server:

sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow OpenSSH
sudo ufw allow 'Nginx Full'
sudo ufw enable
sudo ufw status verbose

Full hardening goes further. Read configure a firewall with UFW on Ubuntu and Ubuntu security hardening guide before you expose production traffic. On managed hosting engagements, this post-install block is where domain and hosting setup meets ongoing server maintenance.

Common install mistakes to avoid

• Skipping checksum verification — corrupted ISOs cause random installer crashes hours in.
• Wrong partition target — always confirm disk labels before clicking Erase disk.
• Weak root or sudo passwords — bots scan fresh VPS IPs within minutes of provisioning.
• Leaving SSH open to password auth — key-only auth is the baseline on every server I deploy.
• Installing non-LTS on production — support windows are short and upgrade paths are painful.
• Forgetting swap on small VPS plans — 1 GB RAM instances need swap to survive Composer or npm peaks.

Canonical publishes official server documentation at documentation.ubuntu.com/server. Use it alongside distro-specific notes when you configure LVM, Netplan, or cloud-init on automated deployments. For PHP application hosting specifically, the Ubuntu server setup for PHP apps article maps packages to Laravel 12 and PHP 8.3 requirements.

How do you troubleshoot Ubuntu installation problems?

Most install failures fall into a small set of repeatable categories. Work through them in order instead of re-downloading blindly.

Boot and media issues

If the machine ignores the USB stick, enter firmware setup and move USB to the top of the boot order. Disable Fast Boot on some laptops. Secure Boot blocks unsigned kernels on certain OEM images; temporarily disable it or use an ISO with proper signing. If the live session freezes, try nomodeset at the GRUB prompt:

# At GRUB menu, press E on the Ubuntu entry, append to linux line:
nomodeset quiet splash

Disk and partition errors

Windows fast startup and hibernation lock NTFS partitions. Turn off fast startup in Windows power settings before dual-boot installs. For encrypted disks, back up data first; full-disk encryption during install is irreversible without the passphrase. NVMe drives sometimes need VMD mode toggled in BIOS for the installer to detect them.

Network failures during install

Server installs over Wi-Fi are unreliable because Subiquity expects Ethernet for initial setup. Use a wired connection or complete install offline and configure Wi-Fi post-boot with Netplan. On headless Raspberry Pi or ARM boards, check the Ubuntu ARM page for hardware-specific images rather than forcing the amd64 ISO.

When a VPS provider ships an outdated 22.04 image, you can upgrade in place to 24.04 using do-release-upgrade. Fresh installs are cleaner for production, though. Snapshot or back up before any release upgrade. Our Ubuntu server backup strategies article covers snapshot timing in detail.

Key Takeaways

• Download Ubuntu 24.04 LTS Desktop or Server only from ubuntu.com and verify SHA256 before flashing.
• Use GPT + UEFI for modern hardware; Rufus on Windows and dd on Linux both produce reliable boot media.
• Pick guided erase for dedicated machines; use manual partitioning for dual-boot or separate /var mounts.
• Run apt update && apt upgrade immediately after first boot to close the ISO freshness gap.
• Harden within the first hour: SSH keys, UFW, fail2ban, and unattended-upgrades on every server.
• Stack web services using LEMP guides after install rather than cramming everything into the installer.

People Also Ask

Is Ubuntu 24.04 LTS free to download and use?

Yes. Ubuntu Desktop and Server are free to download, install, and use on unlimited machines. Canonical charges for Ubuntu Pro extended security and support contracts, but the base LTS operating system costs nothing for personal or commercial use.

How much disk space does Ubuntu need?

Ubuntu Desktop requires at least 25 GB for a comfortable install with updates and dev tools. Ubuntu Server runs on 10 GB for a minimal CLI system, though 20–40 GB is safer once logs, databases, and application code accumulate. Always leave 15–20% free for filesystem health.

Can I install Ubuntu alongside Windows?

Yes. Shrink the Windows partition first, then choose Something else during Ubuntu setup to create ext4 root and optional swap in the freed space. Disable Windows fast startup before install. GRUB detects Windows and adds a boot menu entry automatically.

What is the difference between Ubuntu Desktop and Ubuntu Server?

Desktop ships with GNOME and productivity apps for interactive use. Server installs a minimal command-line system without a GUI, optimised for remote SSH management and background services. Both share the same kernel and package repositories.

Next steps after your Ubuntu install

A clean Ubuntu Download and Installation Guide gets you to a bootable, updated system. The real work starts when you layer Nginx, PHP 8.3, MySQL, Redis, and your application code on top. Follow the linked server guides on this site, or contact us if you want a production-ready VPS configured for Laravel, WordPress, or a custom stack. For broader context on how I approach full-stack delivery, visit the about page or browse the full services listing.