How to install Omeka CMS on Linuxmint 18.03

To install Omeka CMS on Linuxmint 18.03
Omeka is a free and open source content management system for online digital collections. As a web application, it allows users to publish and extend its functionality with themes and plugins.
Installation

Prerequisites

Install LAMP(Apache, MariaDB, and php7.2)
In MariaDB (create database and user and give privileges to that user )

Php installation with required following modules

add-apt-repository ppa:ondrej/php 
apt-get update 
apt-get install php7.2 php7.2-mysql php7.2-curl php7.2-json php7.2-cgi libapache2-mod-php7.2 php7.2-mcrypt
php7.2-xmlrpc php7.2-gd php7.2-mbstring php7.2  php7.2-common  php7.2-xmlrpc php7.2-soap  php7.2-xml php7.2-intl php7.2-cli  php7.2-ldap php7.2-zip php7.2-readline php7.2-imap php7.2-tidy php7.2-recode php7.2-sq php7.2-intl

Installation

Download an Omeka cms package from the following URL https://omeka.org/classic/download/

linuxhelp ~ # cd /home/user/Downloads/
linuxhelp Downloads # ls
omeka-2.6.1.zip

The downloaded package is a zip file, so unzip the package now

linuxhelp Downloads # unzip omeka-2.6.1.zip 
Archive:  omeka-2.6.1.zip
   creating: omeka-2.6.1/
   creating: omeka-2.6.1/admin/
   creating: omeka-2.6.1/admin/themes/
   creating: omeka-2.6.1/admin/themes/default/
   creating: omeka-2.6.1/admin/themes/default/appearance/
   creating: omeka-2.6.1/admin/themes/default/collections/
.
.
.
  inflating: omeka-2.6.1/themes/seasons/gulpfile.js  
  inflating: omeka-2.6.1/themes/seasons/index.php  
  inflating: omeka-2.6.1/themes/seasons/items/show.php  
  inflating: omeka-2.6.1/themes/seasons/javascripts/boxsizing.htc  
  inflating: omeka-2.6.1/themes/seasons/javascripts/jquery-extra-selectors.js  
  inflating: omeka-2.6.1/themes/seasons/javascripts/seasons.js  
  inflating: omeka-2.6.1/themes/seasons/javascripts/vendor/modernizr.js  
  inflating: omeka-2.6.1/themes/seasons/package.json  
  inflating: omeka-2.6.1/themes/seasons/simple-pages/page/show.php  
  inflating: omeka-2.6.1/themes/seasons/theme.ini  
  inflating: omeka-2.6.1/themes/seasons/theme.jpg  

Change the ownership and permission of the extracted directory

linuxhelp Downloads # ls
omeka-2.6.1  omeka-2.6.1.zip
linuxhelp Downloads # chown -R www-data:www-data omeka-2.6.1
linuxhelp Downloads # chmod -R 775 omeka-2.6.1

Move the omeka directory into the /html location

linuxhelp Downloads # mv omeka-2.6.1 /var/www/html/

Edit the db.ini file, configure the database setup

linuxhelp Downloads # cd /var/www/html/omeka-2.6.1/
linuxhelp omeka-2.6.1 # ls
admin        bootstrap.php  files      install      plugins    robots.txt
application  db.ini         index.php  license.txt  README.md  themes
linuxhelp omeka-2.6.1 # vim db.ini
[database]
host     = " localhost" 
username = " omekauser" 
password = " 123" 
dbname   = " omeka" 
prefix   = " omeka_" 
charset  = " utf8" 
port     = " 3306" 

Create a new virtual host configuration for accessing the omeka cms application

linuxhelp omeka-2.6.1 # cd /etc/apache2/sites-available/
linuxhelp sites-available # vim omeka.conf

< VirtualHost *:80> 
ServerName www.linuxhelp1.com
DocumentRoot /var/www/html/omeka-2.6.1/
< Directory /var/www/html/omeka-2.6.1/> 
AllowOverride All
allow from all
< /Directory> 
< /VirtualHost> 

Enable the site access

linuxhelp sites-available # a2ensite omeka.conf 
Enabling site omeka.
To activate the new configuration, you need to run:
service apache2 reload

Enable the rewrite modules.

linuxhelp sites-available # a2enmod rewrite 
Enabling module rewrite.
To activate the new configuration, you need to run:
service apache2 restart

Make an entry to the host file as follows

linuxhelp sites-available # vim /etc/hosts
< your ip address>      < your domain name> 

Restart the apache2 service
linuxhelp sites-available # systemctl restart apache2.service