Can't Update to 18.04 LTS from Ubuntu GNOME 16.04.4 LTS [duplicate]

18.04

Solution 1:

There is still no information about new release here: http://changelogs.ubuntu.com/meta-release So it will not upgrade

Solution 2:

I was having the same problem. But then I run this command in terminal:

update-manager -cd

and I got this:

update notification

Run the above command and see if it solves your problem.

Related

Bijection between an infinite set and its union of a countably infinite set
About linear space generated by algebraically independent set
complex integration, how to evaluate it?
Why does an conditionally convergent infinite series, when deranged, have a different limit?
Solving a non-linear, multivariable system of equations
Prove two sets have same Cardinality by writing down bijection
Strongly equivalent metrics induce equivalent topologies - trouble with radii of balls
Derivative of Symmetric Positive Definite Matrix w.r.t. to its Lower Triangular Cholesky Factor
Derivations on semisimple Lie algebra
Where did the inverse function notation "$f^{-1}$" come from?
Show the Trace$(B)^{2} \leq$ nTrace$(B^{T}B)$
How to integrate logarithm and power function?