How to Upgrade Ubuntu 18.04 LTS to Ubuntu 20.04 LTS
Good news for Ubuntu users, Canonical has released Ubuntu 20.04 LTS on 23rd April 2020. As it is an LTS (Long Term Support) release so ubuntu users will keep getting updates and support till April 2025. So, it is worth to upgrade your Ubuntu 18.04 LTS desktop to Ubuntu 20.04 LTS (Focal Fossa).
In this article we will demonstrate how to upgrade Ubuntu 18.04 LTS to 20.04 LTS. There are two ways to do it either via command line or GUI (Graphical Interface). To complete the upgrade smoothly, a stable internet is required on your Ubuntu system.
Upgrade Ubuntu 18.04 LTS to 20.04 LTS via Command Line
We strongly recommend please the take backup of your existing Ubuntu 18.04, may be on some external drive.
Before start upgrading, let’s take a notw of existing Ubuntu Version, open the terminal and run below command,
[email protected]:~$ cat /etc/lsb-release
We will get the output of above command something like below,
Let’s deep dive into upgradation steps
Step 1) Apply all updates of installed packages
Rub below apt command to install all the updates of installed packages,
[email protected]:~$ sudo apt update [email protected]:~$ sudo apt upgrade -y
Once all the updates are installed including the kernel then reboot your system
[email protected]:~$ sudo reboot
Step 2) Remove unused Kernels and install ‘update-manager-core’
Once your Ubuntu 18.04 LTS desktop is available after reboot, then it is recommended to remove unused kernels to free up the space from /boot partition, run beneath command:
[email protected]:~$ sudo apt --purge autoremove
Execute below command to install “update-manager-core“, as it is required for upgrade, though on most of the systems it should be installed by default. In case it is not installed run below command,
[email protected]:~$ sudo apt install update-manager-core -y
Step 3) Start Upgrade Process
Run following command to view whether new 20.04 LTS version is available for your system.
[email protected]:~$ sudo do-release-upgrade
If, in the above command’s output, you got a message that “There is no development version of an LTS available” then we can force the above command by passing the parameter “-d” to look for the new latest LTS version.
Now run the command to initiate the upgrade procedure,
[email protected]:~$ sudo do-release-upgrade -d
During upgrade procedure, it will prompt you couple of times to type “y” to update package repositories and sometime “enter” to confirm to proceed with upgrade,
Once the upgrade process is completed successfully then we will get following message
Above output confirms that upgrade is completed, upgrade tool prompted us to press ‘y’ to restart the system.
Step 4) Verify Upgrade
Once the system boots after the upgrade, open the terminal type following to verify the Ubuntu version,
[email protected]:~$ cat /etc/lsb-release
Another way to verify the Ubuntu version, Go to Settings and then choose About
This confirms that we have successfully upgrade our Ubuntu 18.04 LTS to latest Ubuntu 20.04 LTS.
Upgrade Ubuntu 18.04 LTS to 20.04 LTS via GUI
Note: The first important task is to take the backup of your Ubuntu 18.04 LTS desktop.
Step 1) Apply Updates of installed packages and reboot
Search “Updater” from search dash and access it by clicking on its icon,
If the updates are available, then we will get the following screen , click on ” Install Now”
Once all the updates are installed, reboot your system once.
Step 2) Start Upgrade Process
Once the system is available after reboot, from the search dash look for “Software & Updates” and then click on its Icon,
From the Updates Tab, set “For long-term support versions” via “Notify me of a new Ubuntu version” drop down menu.
If no upgrade appears, then type “ALT+F2“, enter the command as “update-manager -c -d” and hit enter
In next screen, we will get the following , which says that Ubuntu 20.04 LTS is available for upgrade.
Click on “upgrade” to initiate the upgrade procedure, it will prompt you to enter your user’s credentials.
In the next window, choose “Upgrade“,
Now follow the screen instructions to complete the upgrade procedure, once it is upgraded successfully, it will prompt you to restart the system.
Click on “Restart Now”
Step 3) Verify Ubuntu version after upgrade
Once your Ubuntu system boots up after upgrade, Login and verify Ubuntu version:
From the search tab look for “Settings” and then choose “About”
Above confirms that we have successfully upgrade our Ubuntu 18.04 LTS to 20.04 LTS. That’s all from this article. Your feedback and comments are most welcome.