upgradeUbuntu.sh

#How to upgrade from 15.04 to 16.04
#Check package avaliablity
#http://old-releases.ubuntu.com/ubuntu/dists/
#Try this first:
#http://changelogs.ubuntu.com/meta-release
#https://help.ubuntu.com/community/EOLUpgrades

## EOL upgrade sources.list
# Required
#Add all deb in Software & Updates`> Other Software > Add
deb http://old-releases.ubuntu.com/ubuntu/ CODENAME main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ CODENAME-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ CODENAME-security main restricted universe multiverse

sudo apt-get update
sudo apt-get upgrade
sudo apt-get -f install
reboot
#you got 15.10 here
sudo apt-get update
sudo apt-get dist-upgrade
reboot
#now you got 16.04 here