First, let's get the terms straight so there is no misunderstanding.
An upgrade occurs frequently (daily/weekly) and keeps you on the same release of Ubuntu.
A release-upgrade occurs every 6 months (or 2 years for LTS) and migrates you to a newer release of Ubuntu.
A dist-upgrade is a Debian term for migrating to a newer release of Debian. It's a slightly ...
I think maybe the good methods are:
via GUI: Alt+F2 and type update-manager -d
via command line: sudo do-release-upgrade -d
For this two methods, it is -d, --devel-release option which means update to development version.
So should I upgrade this to Ubuntu 18.04
No. NEVER EVER upgrade a cloud instance. NEVER. Remember: ssh access is the only access you have. If that breaks your instance is gone and you depend on backups and a new instance to get back up running. It is not worth the risk.
or let my server run in 16.04.
Yes. And is is not a server, it is a cloud instance.
You will be able to run Ubuntu with a system that reports slightly less than 4GiB.
The page you link uses jargon: In this case the "recommended minimum system requirements" are just recommended minimum system specifications. The term "requirement" is somewhat misleading but is the common term used.
This is hinted at in the line:
Your output seems pretty clear: Plesk packages are directly causing 12 of the 14 broken package errors. Plesk is the problem.
Also see https://support.plesk.com/hc/en-us/articles/360002913773-Ubuntu-18-04-support-in-Plesk: Plesk does not support release-upgrade.
Plesk supports Ubuntu 18.04 LTS (Bionic Beaver) starting from Plesk Onyx 17.8.
I followed this at github on my Ubuntu 20.04 and it worked perfectly.
8814au ( 8814au.ko )
Linux Driver for USB WiFi Adapters that are based on the RTL8814AU Chipset
Need to install some packages:
sudo apt install dkms git
Now make a directory to build the driver and enter it:
Download the ...
See if there are packages that have upgrades available. If the upgrade fails, just uninstall it. I had to uninstall Skype and the upgrade finally worked!
When I attempted to upgrade from 16.04 to 18.04 I kept on getting the following:
"Please install all available updates for you release before upgrading"
I went ahead and must have ...
In my case I saw this error after apt upgrade, and when I use recovery mode to reinstall the kernel(get version by uname -r), I finally see some error of hdaudio.
Then, I check dpkg logs by
cat /var/log/dpkg.log | grep "xorg-xserver-video*"
and found that the earliest, working version of drivers are HWE versions(have "-hwe" in name), but ...