How to make a script run as root on system startup?

Question

linux

linux mint 18.1 kde plasma 5, you need to make the script run as root at system startup, preferably without entering a password

Answer 1

now, as a universal method, to run scripts at system boot, it is best to use systemd,
an example I already wrote in one of the posts -tyts1 , tyts2

Answer 2

For such cases write a systemd service.

Answer 3

add user to root group