Ubuntu upgrade from 14.04 to 16.04

Asked by peter ratcliffe

Last week I tried to upgrade my desktop from Ubuntu 14.04 LTS to Ubuntu 16.04 LTS. When i look at System Details it still shows as 14.04 LTS. I had expected this would change to 16.04 LTS. How can I tell if the upgrade worked, and if not what to do next. I used sudo apt-get update followed by sudo apt-get dist-upgrade to make the change. Contents of my home directory is still in place, but the system seems to have slowed down.

I had a problem with boot file some time ago, see Question 266626, which has been solved and is closed. Could this be a factor?

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Manfred Hampl
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Best Manfred Hampl (m-hampl) said :
#1

sudo apt-get update followed by sudo apt-get dist-upgrade will not perform the release upgrade from 14.04 to 16.04, but only install all updates available for 14.04

I assume your system is still on 14.04, you can check with the command
lsb_release -crid

There are two possibilities for a release upgrade:
1. Use update-manager. Only later this year update-manager will show that there is a new release available, and ask whether you want to upgrade. (This delay is on purpose to make sure that the first bugs that show up in 16.04 are already corrected before everyone moves from 14.04 to 16.04)
2. use the command
sudo do-release-upgrade
in a terminal window

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peter ratcliffe (pjcr) said :
#2

I'll wait for update manager to tell me 16.04 is available. Thanks for your help