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Landscape- You can use it to monitor and manage both desktop and server instances of Ubuntu.It's useful,because Landscape is a system management tool designed to let you easily manage multiple Ubuntu systems
(It's avaliable for Ubuntu 18.04)

Normal user(no root)
Ubuntu 18.04

Steps:
sudo apt update
sudo apt upgrade
sudo apt install landscape-client
clear
sudo add-apt-repository --update ppa:landscape/19.10(no root)
sudo apt install landscape-server-quickstart(no root)

Postfix Configuration - I chose "No Configuration"

sudo nano /etc/hosts (second line hostname for landscape)
Web browser "ip address that signed to eht0 and starts with 192.XXX.X.XXX"
Signing up in Web Browser

sudo landscape-config --computer-title "File Server" --account-name standalone --url https://xxx.xxx.xxxxx/message-system --ping-url https://xxx.xx.xx/ping
(HTTP and HTTPS proxy URL:empty)
Accept request from the your account.

Installation Complete.