What is the manual method to upgrade Ubuntu 16.04 to Ubuntu 18.04?

ubuntu16.04 wants to upgrade to ubuntu18.04 system, how to upgrade? Let’s take a look at the detailed tutorial below.

1. First update Ubuntu16.04. Open the terminal and enter: sudo apt-get update

2. Enter the account password for authorization.

3. Enter: sudo apt-get dist-upgrade

4. You need to download the decompression authorization, enter Y, and confirm execution.

5. Enter: sudo apt-get autoremove

6. Enter y to confirm execution.

7. Enter: sudo apt-get install update-manager-core

8. Enter: sudo nano /etc/update-manager/release-upgrades, confirm that the prompt line is set to lts

9. Enter the command: sudo do-release-upgrade -d. When the upgrade prompt appears, enter y to confirm execution.

10. After the software package download and installation are completed, you will be prompted to restart. The upgrade is completed after restarting.

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