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Install redis server

Install redis server on Ubuntu is a straightforward process that can greatly enhance the performance of your website. Redis is an in-memory data structure store that can be used as a cache or a database. To install Redis on Ubuntu, follow the steps below:

1. 1. Step 1: Update your system’s package index by running the command:

sudo apt update

1. 1. Step 2: Install Redis by running the command:

sudo apt install redis-server

1. 1. Step 3: Once the installation is complete, start the Redis service by running the command:

sudo systemctl start redis-server

1. 1. Step 4: To ensure that Redis starts automatically on system boot, enable the service by running the command:

sudo systemctl enable redis-server

Configure redis server

After installing Redis, it is important to configure it properly to optimize its performance and security. Here are the steps to configure Redis server on Ubuntu:

1. 1. Step 1: Open the Redis configuration file using your preferred text editor:

sudo nano /etc/redis/redis.conf

1. 1. Step 2: Inside the Redis configuration file, find the line that starts with bind. By default, it is set to 127.0.0.1, which means Redis only listens to connections from the local machine. If you want to allow remote connections, comment out this line by adding a # at the beginning:

# bind 127.0.0.1

1. 1. Step 3: Save the changes and exit the text editor.
   2. Step 4: Restart the Redis service for the changes to take effect:

sudo systemctl restart redis-server

Configure UFW to allow incoming connections to redis server

If you have a firewall enabled on your Ubuntu server, such as UFW, you need to allow incoming connections to the Redis server. Follow these steps to configure UFW:

1. 1. Step 1: Open the UFW configuration file using your preferred text editor:

sudo nano /etc/ufw/before.rules

1. 1. Step 2: Add the following lines at the beginning of the file to allow incoming connections to the Redis server:

# Allow incoming connections to Redis server
-A ufw-before-input -p tcp --dport 6379 -j ACCEPT

1. 1. Step 3: Save the changes and exit the text editor.
   2. Step 4: Restart UFW for the changes to take effect:

sudo ufw reload

Configure WordPress redis plugin

If you are using WordPress, you can take advantage of the Redis server by installing and configuring a Redis cache plugin. Follow these steps to configure the Redis plugin on WordPress:

1. Step 1: Log in to your WordPress admin dashboard.
2. Step 2: Go to the “Plugins” section and click on “Add New”.
3. Step 3: Search for the Redis cache plugin and click on “Install Now”.
4. Step 4: Once the plugin is installed, click on “Activate” to activate the plugin.
5. Step 5: Configure the plugin settings, such as the Redis server host and port.

Configure wp-config.php to connect to remote redis server

To connect WordPress to a remote Redis server, you need to modify the wp-config.php file. Follow these steps:

1. 1. Step 1: Connect to your server using SSH or FTP.
   2. Step 2: Locate the wp-config.php file in the root directory of your WordPress installation.
   3. Step 3: Open the wp-config.php file in a text editor.
   4. Step 4: Add the following lines to the file, replacing “your-redis-server-ip” with the IP address of your remote Redis server:

define('WP_REDIS_HOST', 'your-redis-server-ip');
define('WP_REDIS_PORT', '6379');
define('WP_REDIS_TIMEOUT', '2.5');
define('WP_REDIS_DATABASE', '0');

1. Step 5: Save the changes and exit the text editor.