The latest Ubuntu release, 18.04, marks an opportunity for both LTS users and people on the previous 17.10 release to update Ubuntu and take advantage of the latest features. Thanks to Debian’s upgrade process, it should be relatively simple to either upgrade Ubuntu 16.04 to 18.04 (both LTS) or to upgrade Ubuntu 17.10 to 18.04 LTS Bionic Beaver.
Run your Ubuntu Update
Before you do anything, make sure that your system is already up-to-date. Run a full Ubuntu update and upgrade with Apt.
$ sudo apt update $ sudo apt upgrade $ sudo apt dist-upgrade
This will help to ensure that the difference between packages is as small as possible. It also will be the way that Canonical has most likely tested the upgrade themselves, so it’s least likely to encounter bugs. Lastly, before you begin to upgrade Ubuntu to 18.04 LTS you may also want to remove all no longer required packages using:
$ sudo apt autoremove
How to Upgrade Ubuntu The Ubuntu Way
Ubuntu has developed their own automatic way of upgrading between releases. It essentially scripts the traditional Debian approach. This way, you can set it up to upgrade and walk away. Ubuntu will handle the rest.
If you want to take this route, you’re going to need to install one package first. So, do that.
$ sudo apt install update-manager-core
When that finishes, run the Ubuntu upgrade utility.
$ sudo do-release-upgrade
If you’re doing this too soon, it will tell you that there is
No new release found. In that case, and at your own risk, add the
-d flag at the end of the command to force the upgrade. For more information read the below “No new release found” section.
$ sudo do-release-upgrade -d
Ubuntu will ask you a couple of questions about how you want to handle the upgrade, and it’ll start off upgrading your system.
No new release found
As already mentioned above, upgrades from 17.10 will not be enabled until a few days after 18.04’s release and upgrades from 16.04 LTS will not be enabled until a few days after the 18.04.1 release which is expected in late July 2018.
As a result, your upgrade attempt may result in a message
No new release found while trying to upgrade your Ubuntu system by using
sudo do-release-upgrade command. In this case read the following sections.
Upgrading from Ubuntu 16.04 LTS
Start by executing the
sudo do-release-upgrade command. In case you receive the
No new release found message you have four options:
- The first and recommended approach is to simply wait. Direct upgrades from Ubuntu 16.04 LTS to Ubuntu 18.04 LTS will most likely be unavailable until late July 2018.
- Force direct upgrade by using the
-dswitch. In this case
sudo do-release-upgrade -dwill force upgrade from Ubuntu 16.04 LTS to Ubuntu 18.04 LTS. In case you receive an “Upgrades to the development release are only available from the latest supported release.” message, make sure that release upgrader default behavior is set to
- Upgrade to 17.10 first by changing the default behavior of the release upgrader to
/etc/update-manager/release-upgradesfile. When ready, execute the
sudo do-release-upgradecommand again. Once your system is upgraded to Ubuntu 17.10 then follow the Ubuntu 17.10 to Ubuntu 18.04 upgrade procedure while keeping the release upgrader behavior set to
- Use the Debian way described below to upgrade your Ubuntu 16.04 system.
The upgrade should take a bit of time. Chances are, every package on the system will be upgraded. When the Ubuntu upgrade does finish, reboot the system. When the system comes back up, you’ll be running Ubuntu 18.04 LTS Bionic Beaver!