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How To Completely Reinstall Ubuntu

Ubuntu 8

If you’re looking to start fresh with a clean system or troubleshoot persistent issues, reinstalling Ubuntu might be the solution. This article will guide you through the process of completely reinstalling Ubuntu, ensuring you’re back up and running with a fresh system in no time.

Quick Answer

To completely reinstall Ubuntu, you need to backup your data, create a live disk or USB, boot from the live disk, launch the installer, choose the "Erase disk and install Ubuntu" option, follow the installation wizard, complete the installation, and then restore your data.

Step 1: Backup Your Data

Before we start, it’s crucial to backup all essential data. Reinstalling Ubuntu will erase everything on your system. You can use cloud storage services like Google Drive or Dropbox, or an external storage device for this purpose.

Step 2: Create a Live Disk

To reinstall Ubuntu, you’ll need a live disk or a live USB. You can create one by downloading the latest Ubuntu ISO file from the official website. After downloading the ISO file, you can use a program like Rufus to create a bootable USB drive.

Step 3: Boot from the Live Disk

Restart your computer and enter the BIOS or UEFI settings. The key to enter these settings varies by manufacturer, but it’s usually F2, F12, ESC, or DEL. Once inside, navigate to the boot order settings and set your system to boot from the USB drive or DVD.

Step 4: Launch the Installer

Once you’ve booted from the live disk, you’ll see the option to “Try Ubuntu” or “Install Ubuntu”. Choose “Install Ubuntu” to proceed.

Step 5: Choose Installation Type

During the installation process, you’ll be asked to choose the installation type. Select the “Erase disk and install Ubuntu” option. This will remove all existing data and settings on your hard disk.

Step 6: Follow the Installation Wizard

The installation wizard will guide you through the rest of the process. It will ask you to choose your preferred language, your location, and your keyboard layout.

Step 7: Complete the Installation

After you’ve made all your selections, the installation will proceed. This process may take some time, so be patient. Once the installation is complete, you’ll be prompted to restart your computer. Make sure to remove the live disk or USB before restarting.

Step 8: Restore Your Data

After the reinstallation, you can now restore your data from the backup you created earlier. Remember to also reinstall any necessary software and applications.


Reinstalling Ubuntu is a straightforward process that can resolve many system issues and give you a fresh start. Just remember to always backup your data before proceeding. With this guide, you should be able to reinstall Ubuntu with confidence.

Can I reinstall Ubuntu without losing my data?

No, reinstalling Ubuntu will erase all data on your system. It is essential to backup your data before proceeding.

How can I backup my data?

You can backup your data by using cloud storage services like Google Drive or Dropbox, or by using an external storage device such as a USB drive or an external hard drive.

Can I use a DVD instead of a USB drive for the live disk?

Yes, you can use a DVD instead of a USB drive for the live disk. Make sure to create a bootable DVD by burning the Ubuntu ISO file onto the DVD.

Will reinstalling Ubuntu remove all my installed applications?

Yes, reinstalling Ubuntu will remove all installed applications. You will need to reinstall them after the reinstallation process is complete.

Do I need an internet connection during the reinstallation process?

It is not mandatory to have an internet connection during the reinstallation process. However, having an internet connection can be beneficial for downloading updates and installing additional software during the installation.

Will reinstalling Ubuntu fix all my system issues?

Reinstalling Ubuntu can resolve many system issues, but it may not fix all problems. If you are experiencing hardware issues, reinstalling Ubuntu may not solve them.

Can I choose a different installation type instead of “Erase disk and install Ubuntu”?

Yes, during the installation process, you can choose a different installation type if you want to preserve your existing data. However, it is recommended to backup your data and choose the "Erase disk and install Ubuntu" option for a clean installation.

How long does the reinstallation process take?

The reinstallation process can vary in time depending on your system’s specifications and the speed of your storage device. It can take anywhere from 30 minutes to an hour or more.

Can I reinstall Ubuntu without a live disk or USB drive?

No, you need a live disk or USB drive to reinstall Ubuntu. The live disk or USB drive contains the installation files and allows you to boot into the Ubuntu installation environment.

Is it possible to downgrade to an older version of Ubuntu during the reinstallation?

No, during the reinstallation process, you can only install the latest version of Ubuntu available. If you want to downgrade to an older version, you would need to perform a separate installation of that specific version.

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