How to reinstall the Ubuntu operating system?

To reinstall the Ubuntu system, you can follow these steps:

1. Backup data: Before reinstalling the system, make sure to save important data to an external storage device to prevent data loss.
2. Download the Ubuntu image: Download the latest version of the Ubuntu image file from the official Ubuntu website (https://ubuntu.com/download).
3. Create a bootable disk: Use a downloaded Ubuntu image file to create a bootable disk, using software such as Rufus (for Windows) or Etcher (for Mac).
4. To start up the computer: Insert the prepared startup disk into the computer and then reboot the computer.
5. Access BIOS settings: Press the corresponding key (usually F2, F10, or Delete) during computer startup to enter the BIOS settings interface.
6. Adjust the boot order: In the BIOS settings interface, locate the “Boot” or “Boot Order” option and set the boot disk as the preferred option. Save the settings and exit the BIOS.
7. After installing Ubuntu, the computer will restart and enter the Ubuntu installation interface. Follow the prompts to install, where options such as updating the system and formatting the disk can be chosen.
8. Installation completed: Wait for the installation process to finish, then restart the computer.
9. System configuration: After restarting, follow the prompts to complete the initial setup of Ubuntu, including selecting the time zone and creating a user account.
10. Restore data: copy the previously backed up data back to the newly installed Ubuntu system.

The steps above are a general reference for reinstalling Ubuntu, the specific steps may vary depending on the computer brand and settings. Before reinstalling the system, please ensure to backup important data and proceed with caution.