This will install Zoneminder by using a shell script with one basic command (how easy is that!).

You will need a Ubuntu 18.04 install with LAMP (Apache, MySQL and PHP) installed desktop or server. As an alternate you may use Mariadb in lieu of MySQL

Shell script file contents:

#!/bin/sh
clear
read -p "This script installs Zoneminder 1.32.x on Ubuntu 18.04 AMD64 with LAMP (MySQL) installed...
Press Enter to continue or Ctrl + c to quit" nothing
clear
read -p "You must be logged in as root using sudo su ...
Press Enter to continue or Ctrl + c to quit" nothing
clear
read -p "Next we will add the PPA repository, install and configure the system to run Zoneminder. 
Press enter to continue" nothing
apt install -y software-properties-common
clear
add-apt-repository ppa:iconnor/zoneminder-1.32
apt update
clear
awk '$0="date.timezone = "$0' /etc/timezone >> /etc/php/7.2/apache2/php.ini
clear
apt install -y zoneminder
systemctl enable zoneminder
service zoneminder start
adduser www-data video
a2enconf zoneminder
a2enmod rewrite
chown -R www-data:www-data /usr/share/zoneminder/
service apache2 reload
clear
read -p "Install complete.Press enter to continue" nothing
clear

Copy the contents of the script, open a terminal and run:

nano zm-install

Paste the contents of the script into Nano

Then:

Ctrl + o
Ctrl + x

Next run:

chmod 755 zm-install

Start the script by entering:

./zm-install

Follow the prompts. Things are pretty simple. The timezone will be detected from the OS and added to the php.ini.

Once installation is completed, you can browse the application on the browser:

http://<ip>/zm

A sample connectivity parameters with HIKVision IP Camera is given below as test reference.

Good Luck!

Src: 

https://wiki.zoneminder.com/Ubuntu_Server_18.04_64-bit_with_Zoneminder_1.32.x_the_easy_way

https://github.com/jrbenson/homeassistant-config/wiki/ZoneMinder-on-Ubuntu-18.04