3

I have tried using do-release-upgrade. It shows 

no release found

I tried using do-release-upgrade -d. It says

development releases can only be upgraded from LTS releases

I tried sudo update-manager -c, and it shows an error something like 

MIT-MAGIC COOKIE refused connection

What do I do?

Zanna
  • 70,465
Khushal Sahni
  • 41

2 Answers2

5

Upgrading from Ubuntu 16.04 LTS or 17.10
Upgrades from 17.10 will not be enabled until a few days after 18.04's release. Upgrades from 16.04 LTS will not be enabled until a few days after the 18.04.1 release expected in late July.

There are no offline upgrade options for Ubuntu Desktop and Ubuntu Server.

That's the official announcement from Bionic Beaver release notes

Hope this helps.

kryXtal
  • 51
  • 4
3

I had the same problem. I am not an expert but after reading various posts I tried these commands and finally got my system to start the update:

xhost +

sudo xhost si:localuser:root

sudo update-manager -cd

This problem is related to Wayland. Maybe an expert can explain.

Hope this works for you...I know this can be frustrating :-)

Christopher
  • 31
  • 2