Virtualmin on Ubuntu 18.04.4

You must perform the installation via console (not an SSH session!)

sudo su –

apt-get update

cd /tmp
wget https://software.virtualmin.com/gpl/scripts/install.sh
chmod 777 install.sh
./install.sh

after install

nano /etc/netplan/01-netcfg.yaml
Add addresses: [‘x.x.x.x/xx’]

where x is ip and xx is subnet

then exit and do netplan apply and reboot

resume install via web browser:10000

for php5:
apt install software-properties-common
add-apt-repository ppa:ondrej/php
apt-get update
apt-get install php5.6