Execute o comando follow para configurar várias instâncias do Memcached no servidor do ubuntu 16.04
sudo cp /etc/memcached.conf /etc/memcached_11212.conf
sudo vim /etc/memcached_11212.conf
Note: change the port from 11211 to 11212 or another port which you want.
sudo cp /lib/systemd/system/memcached.service /lib/systemd/system/memcached2.service
sudo vim /lib/systemd/system/memcached2.service
Note: change /etc/memcached.conf to /etc/memcached_11212.conf
sudo systemctl start memcached2.service
sudo systemctl status memcached2.service
sudo netstat -tulpan | grep memcached