adding the pirl user to a group named sudo is not needed(and may not even exists on some boxe).
people are reporting having to add the user to wheel from this tutorial which is a bad idea.
Please edit to say
change "adduser pirl sudo" to "adduser pirl"
and change in the service config
change "Group=sudo" to "Group=pirl"
In case I remove pirl user from sudo so that people would have problems with running systemctl, journalctl, with editing systems start scripts and so on. Thy only way is to make "su root" instead of sudo. What is also a bad idea for newbie to work under root.
Sudo is a normal practice in masternodes. It's always used in all the other masternode coins manuals.
So...I have just added notice that this man is for Ununtu Linux, and everybody feel free not to use it)