In Ubuntu, you can use the following steps to upgrade your system version:
1. Back up important data: Before performing a system upgrade, make sure you back up your important data. While system upgrades are usually a smooth process, it's still wise to back up for security reasons.
2. Update existing systems: Before upgrading, make sure your existing systems are up to date. Run the following command to update installed packages:
sudo apt update
sudo apt upgrade3. Install the upgrade tool: Make sure the update-manager-core package is installed on your system. If not, run the following command to install it:
sudo apt install update-manager-core4. Edit the /etc/update-manager/release-upgrades file: Open the /etc/update-manager/release-upgrades file and ensure that the Prompt line is set to normal. You can use a text editor such as nano or gedit:
sudo nano /etc/update-manager/release-upgradesIn the file, make sure the value of the Prompt line is normal, not lts. Save and close the file.
5. Run the do-release-upgrade command: Run the following command to start the upgrade process:
sudo do-release-upgradeThe system will prompt you if you are willing to upgrade. Follow the prompts. During the upgrade process, the system may ask for some configuration options, and you can choose according to your needs.
6. Wait for the upgrade to complete: The upgrade process may take some time, depending on your system and Internet connection speed. Please be patient and do not interrupt the upgrade process midway.
7. Restart the system: After completing the upgrade, the system will prompt you to restart. Run the following command or use the graphical interface prompts to restart the system:
sudo rebootPlease note that the upgrade process may involve some issues related to package conflicts and configuration file updates. Depending on the system prompts, you may need to perform some manual intervention.
Finally, remember before upgrading your system, make a backup and make sure you understand the changes the upgrade may bring.