Upgrade Ubuntu 14.04 to 16.04

First of all, you have to do backup like here: https://splynx.com/wiki/?wikipage=Console/Backup
use command:

cd /var/www/splynx/system/backup/backup
./backup full=true

Now we can begin to upgrade our server.
So we have:

Let`s start to upgrade:
1.Make your server system up-to-date

sudo apt-get update && sudo apt-get -y upgrade

2.Next step is to fully upgrade the system but without new version distributive:
sudo apt-get -y dist-upgrade

3.And now we upgrade version distributive:
sudo do-release-upgrade

press “Y”

press “Y”

When system has rebooted we will see:

But that’s not all)
When you try open Splynx in web-browser, you will see:

Now you have to reinstall Splynx:

  1. Remove old file “50unattended-upgrades.ucf-old”:
    sudo rm /etc/apt/apt.conf.d/50unattended-upgrades.ucf-old

2.Install Splynx:

sudo wget -qO- https://deb.splynx.com/setup | sudo bash -
sudo apt-get install splynx

And that’s all now, you can see in a browser: