You can disable it by going into System Settings -> Privacy -> Diagnostics and unchecking the box labelled "Send error reports to Canonical." To disable it on Ubuntu Server, edit the /etc/default/whoopsie file and change report_crashes= to false , then run sudo stop whoopsie .

What is Whoopsie Ubuntu?

In Ubuntu, whoopsie is a daemon that is responsible for collecting error reports from apport and then sending that report to Canonical if the user agrees to this in the apport confirmation dialog.

What is apport service?

Apport is a system which: intercepts crashes right when they happen the first time, gathers potentially useful information about the crash and the OS environment, ... and is able to file non-crash bug reports about software, so that developers still get information about package versions, OS version etc.