Magento 2 : Nginx : Install Redis

sudo apt update
sudo apt install redis-server

sudo nano /etc/redis/redis.conf

change supervised no to supervised systemd

sudo systemctl restart redis.service
sudo systemctl status redis
redis-cli
sudo systemctl restart redis.service
sudo apt install net-tools
sudo netstat -lnp | grep redis
php bin/magento cache:flush

Change app/etc/env.php

'cache' => [
    'frontend' => [
        'default' => [
            'backend' => 'Magento\\Framework\\Cache\\Backend\\Redis',
            'backend_options' => [
                'server' => '127.0.0.1',
                'database' => '0',
                'port' => '6379'
            ],
        ],
        'page_cache' => [
            'backend' => 'Magento\\Framework\\Cache\\Backend\\Redis',
            'backend_options' => [
                'server' => '127.0.0.1',
                'port' => '6379',
                'database' => '1',
                'compress_data' => '0'
            ]
        ]
    ],
    'allow_parallel_generation' => false
],