Under settings, sharing there is no option for Screen Sharing however on another machine with exactly the same image there is an option for Screen Sharing. Any assistance would be appreciated.
2 Answers
You are likely talking about minimal installation of Ubuntu 18.04, which doesn't provide vino. So just:
sudo apt-get install vino
the option is back!
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This was my issue as well. I forgot I used minimal. I would also recommend the other answer of enabling dconf-editor after installing vino. The basic settings dont work due to bug in Ubuntu since 2014. Using dconf-editor one has to disable "encryption" so clients like Mac can connect May 18, 2019 at 14:05
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Install dconf Editor
sudo apt install dconf-editor
Open it and go to /org/gnome/desktop/remote-access/ you may find the settings there.
vino/bionic,now 3.22.0-3ubuntu1 amd64 [installed] VNC server for GNOME
Of course you should update:sudo apt-get update
and then just reinstall:sudo apt-get install --reinstall vino
Hope that helps!