How to upgrade to Ubuntu 16.04 LTS from Ubuntu 15.10
Ubuntu 16.04 LTS final has been released few minutes ago.
In this tutorial, let us see how to upgrade to Ubuntu 16.04 LTS from Ubuntu 15.10 and older versions.
Upgrade to Ubuntu 16.04 desktop
Before going to upgrade, we need to update the system.
Open up the Terminal and enter the following commands.
sudo apt-get update && sudo apt-get dist-upgrade
The above command will download and install the latest available packages.
Reboot your system to finish installing updates.
Now, enter the following command to upgrade to new available version.
sudo update-manager -d
Software Updater window will show up and it is going to search for the available new release.
After a few seconds, you will see a screen like below that saying:
“The software on this computer is up to date.
However, Ubuntu 16.04 LTS is available now (you have 15.10)”.
Click Upgrade button to start the upgrade.
Then, Click Upgrade.
Note: As of writing this tutorial, The upgrade release notes wizard still showed message “Welcome to Ubuntu Xenial Xerus development release”. This message will be gone once after all Ubuntu mirrors are updated with latest Ubuntu images.
After few minutes, the software updater will ask you to start the upgrade.
Click Start upgrade to continue.
Now, the distribution upgrade will download new packages. Sit back and grab a cup of coffee. It will take a while depending upon your Internet connection speed.
Close Remove to remove obsolete packages.
Finally, click “Restart Now” button to complete the upgrade process.
Congratulations. Ubuntu 15.10 has been successfully upgraded to version 16.04.
Log in to the newly upgraded Ubuntu 16.04 desktop.
Here it is how my Ubuntu 16.04 LTS desktop looks like.
To view the Ubuntu desktop details, go to System settings > Details from Unity dash.
From command line, you can view the system details using command:
DISTRIB_ID=Ubuntu DISTRIB_RELEASE=16.04 DISTRIB_CODENAME=xenial DISTRIB_DESCRIPTION="Ubuntu 16.04 LTS" NAME="Ubuntu" VERSION="16.04 LTS (Xenial Xerus)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 16.04 LTS" VERSION_ID="16.04" HOME_URL="http://www.ubuntu.com/" SUPPORT_URL="http://help.ubuntu.com/" BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/" UBUNTU_CODENAME=xenial
To view the Kernel details, run:
Linux ostechnix-sk 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
That’s it. Start using Ubuntu 16.04 LTS
Ubuntu 16.04 LTS Server Upgrade
We saw how to upgrade to Ubuntu 16.04 desktop. Now, we will see how to upgrade from Ubuntu 15.10 server to Ubuntu 16.04 server.
First, Install the update-manager-core package if it is not installed yet using command:
sudo apt-get install update-manager-core
Then, Edit the file /etc/update-manager/release-upgrades,
sudo nano /etc/update-manager/release-upgrades
and set Prompt=normal or Prompt=lts as shown below.
# Default behavior for the release upgrader. [DEFAULT] # Default prompting behavior, valid options: # # never - Never check for a new release. # normal - Check to see if a new release is available. If more than one new # release is found, the release upgrader will attempt to upgrade to # the release that immediately succeeds the currently-running # release. # lts - Check to see if a new LTS release is available. The upgrader # will attempt to upgrade to the first LTS release available after # the currently-running one. Note that this option should not be # used if the currently-running release is not itself an LTS # release, since in that case the upgrader won't be able to # determine if a newer release is available. Prompt=normal
- Normal – Check to see if a new release is available. If more than one new release is found, the release upgrader will attempt to upgrade to the release that immediately succeeds the currently-running release.
- LTS – Check to see if a new LTS release is available. The upgrader will attempt to upgrade to the first LTS release available after the currently-running one. Note that this option should not be used if the currently-running release is not itself an LTS release, since in that case the upgrader won’t be able to determine if a newer release is available.
As you already know, Ubuntu 16.04 is the next available version to Ubuntu 15.10, so I simply left it as normal.
Now, it is time to upgrade your server system to latest version using the following commands:
sudo apt-get update && sudo apt-get dist-upgrade
Reboot your system to apply the updates.
In case you’re upgrading via SSH, it is better to start the upgrade session within screen session. Because in case of any SSH connection failure during upgrade process, you can easily reconnect with the upgrade session.
To install the screen tool, run:
sudo apt-get install screen
Then start the screen session using command:
In case of any failure, you can re-attach to the upgrade session with command:
Now, start the upgrade process with command:
sudo do-release-upgrade -d
Type Y and press ENTER.
Press ENTER again.
After a while, you’ll be asked to continue the upgrade process. Type Y and press ENTER to continue.
The upgrade process will take place. Sit back and grab a cup of coffee.
It will take from few minutes to hours depending upon the speed of your Internet.
Once the latest packages are downloaded and installed, type Y and press ENTER to remove the obsolete packages.
Finally, to finish the upgrade type Y and press ENTER.
Congratulations! Welcome to Ubuntu 16.04 LTS Xenial Xerus development version.
Upgrading to Ubuntu 16.04 LTS version is a piece of cake. The upgrade process for both server and desktop went smooth without a single issue. It’s time to explore what’s new in Ubuntu 16.04 server.
I will be here soon with another interesting article. Until then stay tuned with us and share this article to your social networks, and support OSTechNix.