Paste following right after <?php line.\
\
define( 'WP_REDIS_PATH', '' );\
define('WP_REDIS_PASSWORD','');
// change the prefix and database for each site to avoid cache data collisions\
define( 'WP_REDIS_PREFIX', 'my_first_site' );\
define( 'WP_REDIS_DATABASE', 0 ); // 0-15\
// reasonable connection and read+write timeouts\
define( 'WP_REDIS_TIMEOUT', 1 );\
define( 'WP_REDIS_READ_TIMEOUT', 1 );\
define( 'WP_REDIS_SCHEME', 'unix' );