How to Upgrade Ubuntu 16.04 to 18.04 LTS Server

How to Upgrade Ubuntu 16.04 to 18.04 LTS Server
sudo apt update
sudo apt upgrade

sudo apt dist-upgrade
reboot


sudo apt install update-manager-core

sudo vim /etc/update-manager/release-upgrades
set prompt=lts

sudo do-release-upgrade -d
reboot

lsb_release -a