For simply management OS

wget https://raw.githubusercontent.com/webmin/webmin/master/setup-repos.sh
sh setup-repos.sh -f
apt-get install --install-recommends webmin

Edit webmin config

nano /etc/webmin/miniserv.conf

Setting port & disable ssl via change next

ssl=0
port=8000

Apply changes

systemctl restart webmin

Open firewall

sudo ufw allow 8000/tcp
sudo ufw reload

Open http://[Host_ip]:8000/ in your browser & log in with your system credentials – username & password.