I tried to use the software updater but it doesn't give the upgrade option
19288
Update manager doesn't offer an upgrade to the new release
36025
How do I change which mirror I get updates and software from?
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
64558
What does `do-release-upgrade` really do?
51768
Could not calculate the upgrade, what happened?
101714
Is there any way to roll back the most recent upgrade?
12578
How do I upgrade to a newer version of Ubuntu?
86777
Distribution upgrade problem "No new release found"
83960
How do I change my update server in Ubuntu 18.04?
154072
Ubuntu 17.10 doesn't show up in update-manager
35190
"Software Updater" & "Software & Updates" not working
93942
How to fix "Failed to download repository information" error while updating?
4660
Should I be offered the option to upgrade to 18.04.1?
93895
Why do I receive Software Update notifications if there are no updates available?
8962
How to install multiple versions of the same software?
118978
Not all updates can be installed: partial upgrade
158145
A software update is required to use this startup disk - does not update