How To Install Ubuntu on Your Computer: A Clear Step‑by‑Step Guide

Installing Ubuntu, a popular Linux-based operating system, is often easier than people expect. The installer walks you through most of the process, but there are still choices to make that depend on your hardware, your current operating system, and how you plan to use your computer.

This guide explains how Ubuntu installation works, what you need to prepare, the main setup paths (dual-boot, full install, etc.), and where your own situation becomes the deciding factor.

What Ubuntu Is and What “Installing” It Really Means

Ubuntu is an operating system (OS), like Windows or macOS. Installing Ubuntu means you’re putting this OS on your computer’s storage drive (HDD, SSD, or NVMe). After that, when your computer starts, you can:

• Boot into Ubuntu only (if it’s the only OS installed), or
• Choose between Ubuntu and another OS (if you set up a dual-boot system).

At a high level, installing Ubuntu involves:

1. Downloading an Ubuntu disk image (an ISO file).
2. Creating a bootable USB drive from that ISO.
3. Booting your computer from the USB instead of its internal drive.
4. Running the Ubuntu installer, which:
   • Detects your existing OS and disks
   • Lets you choose how Ubuntu should be installed
   • Copies Ubuntu files and sets up the bootloader
5. Restarting into your new Ubuntu system and finishing basic setup.

You don’t need deep Linux knowledge for this, but you do need to be careful about disk choices, because those decide whether you keep or erase your existing system.

Minimum Requirements and What You Need Before You Start

Ubuntu itself is fairly modest, but there are practical minimums.

Typical system requirements

These are general guidelines for a smooth experience with the standard Ubuntu desktop:

Many older systems can still run Ubuntu, but performance depends heavily on RAM and storage speed (SSD vs HDD).

What you’ll need to install Ubuntu

• A USB flash drive (typically 4–8 GB or larger).
• A working computer to download Ubuntu and prepare the USB.
• Ubuntu ISO file:
  • Download from the official Ubuntu website so you get a genuine, unmodified image.
• A tool to create a bootable USB, such as:
  • On Windows: common USB imaging tools
  • On macOS/Linux: dd command (advanced) or similar utilities
• Backup of important data:
  • Any install method that touches your disk carries risk. Even when choosing “Install alongside,” a backup is basic good practice.

Step 1: Download the Correct Ubuntu Image

On the official Ubuntu website you’ll see a few options:

• Ubuntu Desktop (LTS) – the standard desktop version with long-term support.
• Flavours – variants like Kubuntu, Xubuntu, etc. that use different desktop environments.
• Ubuntu Server – no desktop environment by default, mainly for servers.

For most people installing Ubuntu on a home or work computer, Ubuntu Desktop LTS is the typical starting point.

When you download:

• Choose 64-bit (this is standard for most modern machines).
• Save the .iso file to an easy-to-find location.

Some users also verify the checksum of the ISO to ensure it was downloaded correctly and not corrupted. This is a good security habit, but optional for beginners.

Step 2: Create a Bootable Ubuntu USB Drive

You can’t just copy the ISO file to the USB stick; it needs to be made bootable so your computer can start from it.

The process is generally:

1. Insert your USB drive into the working computer.
2. Open your USB creation tool.
3. Select the Ubuntu ISO you downloaded.
4. Select your USB drive as the target.
5. Start the process and wait until it completes.

This process erases the USB drive contents, so move any files you need off it first.

Once it’s done, you have a bootable Ubuntu installer USB.

Step 3: Boot Your Computer from the USB

Next, you need your computer to start (boot) from the USB instead of your normal operating system.

Typical steps:

1. Insert the Ubuntu USB into the computer where you want to install Ubuntu.
2. Restart the computer.
3. As it starts, press the boot menu key or enter the BIOS/UEFI setup:
   • Common keys include: F2, F10, F12, Esc, or Del. The specific key depends on your computer or motherboard brand.
4. In the boot menu, choose the USB drive as the boot device.

On many modern systems with UEFI:

• You may need to:
  • Disable Secure Boot, or
  • Allow the USB drive as a trusted boot source.
• Some systems boot Ubuntu fine with Secure Boot left enabled; others need it turned off.

If everything works, you’ll see the Ubuntu boot menu and then a desktop-like environment with options.

Step 4: Try Ubuntu or Start the Installer

When Ubuntu loads from the USB, you usually see two main choices:

• Try Ubuntu
  • Runs Ubuntu directly from the USB.
  • Lets you test hardware compatibility (Wi‑Fi, sound, trackpad, etc.) without changing your disk.
• Install Ubuntu
  • Starts the full installer to put Ubuntu on your drive.

You can safely choose Try Ubuntu first to make sure the basics work, and then click the Install Ubuntu icon on the desktop when you’re ready.

Step 5: Follow the Ubuntu Installer Steps

The Ubuntu installer is mostly a wizard. It asks a series of questions:

Language and keyboard

• Choose your language.
• Pick your keyboard layout (or detect it).

Updates and third-party software

You’ll see checkboxes such as:

• Download updates while installing Ubuntu
• Install third-party software for graphics and Wi‑Fi hardware and additional media formats

If you have a reliable internet connection during install, these can save time later. If you’re offline, you can skip them and install updates after.

The most important choice: Installation type

This is where you decide how Ubuntu will coexist with (or replace) your current system. The options you see depend on whether another OS is detected.

Common options include:

• Install Ubuntu alongside [existing OS]
• Erase disk and install Ubuntu
• Something else (manual partitioning)

Here’s how these differ:

This step is where data loss risk is highest if you choose the wrong drive or partition, so double-check:

• The correct disk (especially if your system has multiple drives).
• Whether you’re comfortable resizing partitions or erasing the disk.

Once you confirm, the installer will start copying files.

Time zone, user account, and password

You’ll then set:

• Your time zone (often detected automatically by location).
• Your name, computer name, username, and password.

That password is important: you’ll use it to:

• Log in
• Approve system changes
• Install software

The installer then finishes copying files and setting up the bootloader.

Step 6: Reboot Into Ubuntu

When the installer completes, you’ll be prompted to restart the computer.

• Remove the USB drive when you’re told to (or when the system starts to reboot).
• On restart, depending on what you chose:
  • If you erased the disk: the system should boot straight into Ubuntu.
  • If you did a dual-boot install: you should see a boot menu (often called GRUB) where you can choose Ubuntu or your previous OS.

You’ll then log in and can start using Ubuntu, run updates, and install applications from the Ubuntu Software app or using the terminal.

Variables That Change How You Should Install Ubuntu

The overall process is similar for everyone, but several factors change the best way to do it.

1. Current operating system and disk layout

• Only one OS currently (e.g., just Windows):
  • You can either replace it or install alongside for dual-boot.
• Multiple drives (e.g., SSD + HDD):
  • You might install Ubuntu on one drive and leave the other as data or for another OS.
• Older systems using legacy BIOS vs newer UEFI:
  • Affects how bootloaders and partitions (like EFI System Partitions) are set up.

2. Type and size of your storage

• Small SSD (e.g., 64–128 GB):
  • You’ll need to be careful with partition sizes and how much space you allocate to Ubuntu.
• Large HDD/SSD:
  • Easier to dedicate space to Ubuntu or to run it as the only OS.
• Very old drives:
  • Ubuntu can still install, but performance may be limited by disk speed.

3. Hardware specifics

• Graphics card:
  • Some dedicated GPUs may need proprietary drivers for best performance (Ubuntu can install many of these during or after install).
• Wi‑Fi adapter:
  • Certain chipsets may require additional drivers or firmware.
• Very new or very old hardware:
  • May need specific workarounds compared to more “boring,” standard machines.

4. Your technical comfort level

• Beginner:
  • Simpler paths like “Install alongside” or “Erase disk and install” are less overwhelming.
• Advanced user:
  • Might prefer “Something else” to control partitions (e.g., separate /home, custom mount points, multiple OSes).

5. How you plan to use Ubuntu

• Primary everyday OS:
  • You may want the entire disk for Ubuntu, a separate home partition, and possibly more storage.
• Testing / learning only:
  • Dual-boot or running Ubuntu in a virtual machine can make more sense.
• Server-like tasks:
  • You might choose Ubuntu Server instead of Desktop, with a different installation flow.

Different Ways People Commonly Install Ubuntu

Once you understand the variables, you can see why there isn’t just one “correct” install method. There’s a spectrum of setups:

1. Full replacement of your existing OS

• Erase disk and install Ubuntu
• Cleanest setup: whole drive for Ubuntu, simple boot
• Best if you’ve decided Ubuntu will be your main (or only) OS and your data is backed up elsewhere

2. Dual-boot with Windows or another OS

• Install Ubuntu alongside
• Lets you choose between Ubuntu and your other OS at startup
• Useful when:
  • You still need specific apps that only run on your original OS
  • You’re transitioning gradually to Ubuntu

How the disk is split (how much space each OS gets) can matter a lot over time.

3. Manual custom layout

• Something else in the installer
• Possible setups:
  • Multiple Linux distributions on the same disk
  • Separate partitions for /, /home, and swap
  • Ubuntu on an SSD with data on an HDD
• Flexible, but requires understanding of partitions and mount points

4. Ubuntu in a virtual machine (no disk changes)

Technically this is not installing Ubuntu directly on bare hardware; instead, you install it inside software like VirtualBox or other hypervisors. The steps:

• Create a virtual machine.
• Mount the Ubuntu ISO in the VM.
• Go through the same installer process, but all changes stay in a virtual disk file.

This avoids touching your real disk partitions, at the cost of some performance and more resource usage.

Where Your Own Setup Becomes the Missing Piece

The basic Ubuntu installation flow is straightforward: create a USB, boot from it, run the installer, pick how it should use your disk, and restart. That part doesn’t change much.

What does change a lot is:

• Whether you should erase your disk or dual-boot
• How much space Ubuntu should get on your drive
• Whether to use manual partitioning or the guided options
• How to handle UEFI/Secure Boot, especially on newer laptops
• Whether Ubuntu should be on bare metal or in a virtual machine
• How your hardware quirks (Wi‑Fi, graphics, special storage setups) affect driver choices

Those pieces depend on your exact computer, how much risk you’re comfortable with, and what you want Ubuntu to do for you once it’s installed.