How to upgrade ubuntu from 16.04 to 18.04

Overview

To upgrade Ubuntu 16.04 to Ubuntu 18.04, follow these steps:

• Backup your important data: Before starting the upgrade process, it is always recommended to back up your important files and data.
• Update your current Ubuntu 16.04 system: Open a terminal and run the following commands:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

• Install the update-manager-core package: If it is not already installed, run:

Key steps and notes

sudo apt-get install update-manager-core

• Run the release upgrade tool: Start the upgrade process using:

sudo do-release-upgrade

• Follow the prompts: During the upgrade, you will be asked several questions, such as whether to keep or replace configuration files. Follow the instructions based on your requirements.
• Reboot your system: Once the upgrade process is complete, restart your system to apply the changes.
• Verify the upgrade: After rebooting, check your Ubuntu version by running:

Final notes

lsb_release -a

This command will display your current Ubuntu version, which should now be 18.04.