Imagine that, I have a fresh Ubuntu 18.04 installed. But there are some default packages or services that connects to the Internet without my consent. How to get rid of them completely or make them offline in an effective way?
As far as I now, they are:
popularity-contest - The Ubuntu Popularity Contest (or popcon, in short) gathers statistics determining which packages are the most popular with Ubuntu users.
unattended-upgrades - Automatically upgrades computer with the latest security updates.
apt-daily - Updates apt index every day automatically.
snapd - Updates snap packages automatically.
update-manager - Checks for release updates.
I could be missing something. Please post if you know...
The purpose: I want to have full control over the Internet, as in my case, Internet is limited. So, I wish to update or upgrade manually rather than automatically.