Create a database in PostgreSQL using the PostgreSQL database admin utility:

sudo -u postgres psql

CREATE DATABASE $DBNAME;

Exit the database admin utility.

\q <enter>

Create the Hue user:

sudo -u postgres psql -d $DBNAME

CREATE USER $HUEUSER WITH PASSWORD '$HUEPASSWORD';

where $HUEUSER is the Hue user name and $HUEPASSWORD is the Hue user password.

Open the /etc/hue/conf/hue.ini file and edit the [[database]] section (modify for your PostgreSQL setup).

[[database]]
engine=postgresql_psycopg2
host=$DATABASEIPADDRESSORHOSTNAME
port=$PORT
user=$HUEUSER
password=$HUEPASSWORD
name=$DBNAME

Install the PostgreSQL database adapter for Python (psycopg2). For RHEL/CentOS/Oracle Linux:

yum install python-devel -y 
yum install postgresql-devel -y 
cd /usr/lib/hue 
source build/env/bin/activate 
pip install psycopg2 

Synchronize Hue with the external database to create the schema and load the data:

/usr/lib/hue/build/env/bin/hue syncdb --noinput

Start Hue:

/etc/init.d/hue start