Linux Ububntu 18.04 Use memcached for PHP session storage

https://devdocs.magento.com/guides/v2.3/config-guide/memcache/memcache_ubuntu.html

apt update -y && apt install php-memcached memcached
/etc/php/7.2/fpm/php.ini
session.save_handler = "memcached"
session.save_path = "127.0.0.1:11211"

or /etc/php/7.2/fpm/pool.d/user.conf
php_admin_value[session.save_path] = '127.0.0.1:11211'
php_admin_value[session.save_handler] = 'memcached'

phpinfo should display memcached info on the page.

Check working with a script cache-test.php