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How to Install and Connect to PostgreSQL on Ubuntu 14.04

PostgreSQL (pronounced ‘post-gres-Q-L’) is a free, open-source object-relational database management system (object-RDBMS), similar to MySQL, and is standards-compliant and extensible. It is commonly used as a back-end for web and mobile applications. PostgreSQL, or ‘Postgres’ as it is nicknamed, adopts the ANSI/ISO SQL standards together, with the revisions.

Pre-Flight Check
  • These instructions are intended specifically for installing PostgreSQL on Ubuntu 14.04 LTS.
  • I’ll be working from a Liquid Web Core Managed Ubuntu 14.04 LTS server, and I’ll be logged in as root.

Step 1: Install PostgreSQL

First, you’ll follow a simple best practice: ensuring the list of available packages is up to date before installing anything new.

apt-get -y update

Then it’s a matter of just running one command for installation via apt-get:

apt-get -y install postgresql postgresql-contrib

Postgres should now be installed and ready to use.

Step 2: Switch to the Default PostgreSQL User

As part of the installation Postgres adds the system user postgres and is setup to use “ident” authentication. Roles internal to Postgres (which are similar to users) match with a system user account.

Let’s switch into that system user:

su – postgres

And then connect to the PostgreSQL terminal (in the postgres role):

psql

That’s it! You’re connected and ready to run commands in PostgreSQL as the postgres role. In future (Aug 2014) articles we’ll delve into creating new roles, changing a role’s password, creating/deleting databases, backups, etc.

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