$ sudo apt-get update
$ sudo apt-get install kexi-postgresql-driver 

kexi-postgresql-driver is installed in your system.

Make ensure the kexi-postgresql-driver package were installed using the commands given below,

$ sudo dpkg-query -l | grep kexi-postgresql-driver *

You will get with kexi-postgresql-driver package name, version, architecture and description in a table

kexi-postgresql-driver package basic information: