How can I switch on the option to be notified for a new Ubuntu version, which you usually find in
Dash --> System Settings --> Software & Updates --> Updates --> Notify me of a new Ubuntu version`
from command line to never
?
Here is how you can do it from command line.
sudo sed -i 's/=lts/=never/g' /etc/update-manager/release-upgrades
g
flag is not necessary here. Just 's/=lts/=never/'
should suffice.
sudo nano /etc/update-manager/release-upgrades
.