HOWTO : Upgrade Ubuntu Gnome 16.04 LTS to Ubuntu Desktop 18.04 LTS

There is no version 18.04 for Ubuntu Gnome at the moment. If you want to upgrade from Ubuntu Gnome 16.04 to Ubuntu 18.04, you can follow the procedure below.

Step 0 :

update-manager -cd

After that, reboot the box.

Step 1 :

sudo apt remove gnome-session ubuntu-gnome-desktop gnome-session-flashback plymouth-theme-ubuntu-gnome-text plymouth-theme-ubuntu-gnome-logo gnome-session-flashback

select "gdm3" when asked.

Step 2 :

sudo update-alternatives --config default.plymouth

select "auto mode" of "/usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth"

Step 3 :

sudo update-initramfs -u

Then reboot.

That's all! See you.