What is the program for remote monitoring of user actions?

Question

Monitoring

Good afternoon!
Here we set a task, I haven’t come across this before, you need to know what remote users do at their computers, what programs they run, what they copy or send, in general, everything that happens on the computer. At any time, "view the activity log" of the user.
The computers will be in another city, they will have a router that distributes the Internet, in principle, while both tools for Windows and Linux are considered.

Answer 1

A friend recently wrote a coursework about a similar software. Described the Yaware program
www.yaware.com.ua

Answer 2

www.zabbix.com

Answer 3

under Windows there is a shell-to. there are a lot of things but I don't think it's the best option, but you can consider it as a spare. if on Linux, then you can write the scripts yourself.