Ubuntu 16.04.2 LTS has been released a while a go but unfortunately I just got chance to update to this new version. Updating to Ubuntu 16.04 from Ubuntu 14.04 is possible without having to reinstall the whole system. With few commands, I can successfully upgraded my Ubuntu 14.04 LTS to Ubuntu 16.04.2 LTS.
Steps to Upgrade Ubuntu 14.04 LTS to Ubuntu 16.04 LTS Server
Step 1. Update System
Use this command to update Ubuntu 14.04
sudo apt-get update && sudo apt-get upgrade
Step 2. Install update-manager-core package
Skip this step if you have installed update-manager-core package. Otherwise, use this command to install it
sudo apt-get install update-manager-core
Step 3. Configure update-manger-core
Since we want to upgrade between LTS release, we need to make sure that we have the correct setting for it. Make sure the file /etc/update-manager/release-upgrades is set to “lts”.
sudo nano /etc/update-manager/release-upgrades
Make sure it shows “lts” at the bottom of the file like this
Step 4. Perform Upgrade
To start the upgrade process, use this command
Once completed, reboot your sever and check if now its upgraded to the new version
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