How to Install Omeka on NixOS Latest

Omeka is a free and open-source content management system that allows users to create and publish digital exhibitions, collections, and archives. This tutorial will guide you through the steps required to install the Omeka content management system on NixOS Latest.

Step 1: Update the System

Before you start the installation process, it's important to update the system to ensure that all packages are up-to-date. To do this, open a terminal and run the following command:

sudo nixos-rebuild switch

This will update the system to the latest version.

Step 2: Install Required Packages

Omeka requires several packages to work properly. To install these packages, open a terminal and run the following command:

sudo nix-env -iA nixos.gd nixos.php

The above command will install the required packages.

Step 3: Download and Configure Omeka

Once the required packages are installed, you can download and configure Omeka. Here are the steps to do so:

Create a new directory for Omeka by running the following command in the terminal:
```
sudo mkdir /var/www/omeka
```
Download the latest version of Omeka from the official website:
```
sudo wget https://omeka.org/wp-content/files/omeka-2.7.1.zip
```

Unzip the downloaded file:

sudo unzip omeka-2.7.1.zip -d /var/www/omeka/

Change the ownership of the Omeka directory:

sudo chown -R www-data:www-data /var/www/omeka/

Create a new PHP-FPM pool configuration file:

sudo nano /etc/nixos/php-fpm.d/omeka.conf

Add the following configuration to the file:

[omeka]

user = www-data
group = www-data

listen = /run/php/omeka.sock
listen.owner = www-data
listen.group = www-data
listen.mode = 0660

pm = dynamic
pm.max_children = 10
pm.start_servers = 4
pm.min_spare_servers = 2
pm.max_spare_servers = 6

env[PATH] = /usr/local/bin:/usr/bin:/bin
env[TMPDIR] = /var/tmp

Save and close the file (Ctrl + X, Y, Enter).

Step 4: Configure the Web Server

Now that Omeka is downloaded and configured, you need to configure the web server to serve the Omeka application. Here are the steps to do so:

Create a new Nginx server block configuration file:
```
sudo nano /etc/nixos/nginx/conf.d/omeka.conf
```

Add the following configuration to the file:

server {
    listen 80;
    server_name omeka.example.com;

    root /var/www/omeka/;
    index index.php;

    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }

    location ~ \.php$ {
        include fastcgi_params;
        fastcgi_pass unix:/run/php/omeka.sock;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    }
}

Replace omeka.example.com with your own domain name.

Test the Nginx configuration:
```
sudo nginx -t
```
If the configuration is valid, reload Nginx:
```
sudo systemctl reload nginx
```

Step 5: Install Omeka

Finally, you can install Omeka by visiting the URL http://omeka.example.com in a web browser. Follow the on-screen prompts to complete the installation process.

Congratulations, you have successfully installed Omeka on NixOS Latest!