$ sudo apt-get update
$ sudo apt-get install php-doctrine-dbal 

php-doctrine-dbal is installed in your system.

Make ensure the php-doctrine-dbal package were installed using the commands given below,

$ sudo dpkg-query -l | grep php-doctrine-dbal *

You will get with php-doctrine-dbal package name, version, architecture and description in a table

php-doctrine-dbal package basic information: