Upgrade to 18.04 from 17.10

Question

When I attempt to upgrade Ubuntu from 17.10 to 18.04, the Update Manger says "Your computer is up-to-date."

Why isn't it detecting the new release?

Answer 1

-d is for development releases. Do not put that command-line [option] in the command.

If you want a fresh and stable 18.04 simply type:

sudo do-release-upgrade

Now press enter

Answer 2

You need to wait for some days (more like a week or two) before the Update Manager tells you.

If you don't want to wait so long you can use the following command:

sudo do-release-upgrade -d

Make sure nothing is going to interupt this process.