---
layout: default
navsection: installguide
title: Install PostgreSQL 9.4+
...
{% comment %}
Copyright (C) The Arvados Authors. All rights reserved.

SPDX-License-Identifier: CC-BY-SA-3.0
{% endcomment %}

Arvados requires at least version *9.4* of PostgreSQL.

* "CentOS 7":#centos7
* "Debian or Ubuntu":#debian

h3(#centos7). CentOS 7
{% assign rh_version = "7" %}
{% include 'note_python_sc' %}

# Install PostgreSQL
  <notextile><pre># <span class="userinput">yum install rh-postgresql95 rh-postgresql95-postgresql-contrib</span>
~$ <span class="userinput">scl enable rh-postgresql95 bash</span></pre></notextile>
# Initialize the database
  <notextile><pre># <span class="userinput">postgresql-setup initdb</span></pre></notextile>
# Configure the database to accept password connections
  <notextile><pre><code># <span class="userinput">sed -ri -e 's/^(host +all +all +(127\.0\.0\.1\/32|::1\/128) +)ident$/\1md5/' /var/lib/pgsql/data/pg_hba.conf</span></code></pre></notextile>
# Configure the database to launch at boot and start now
  <notextile><pre># <span class="userinput">systemctl enable --now rh-postgresql95-postgresql</span></pre></notextile>

h3(#debian). Debian or Ubuntu

Debian 8 (Jessie) and Ubuntu 16.04 (Xenial) and later versions include a sufficiently recent version of Postgres.

Ubuntu 14.04 (Trusty) requires an updated PostgreSQL version, see "the PostgreSQL ubuntu repository":https://www.postgresql.org/download/linux/ubuntu/

# Install PostgreSQL
  <notextile><pre># <span class="userinput">apt-get --no-install-recommends install postgresql postgresql-contrib</span></pre></notextile>
# Configure the database to launch at boot and start now
  <notextile><pre># <span class="userinput">systemctl enable --now postgresql</span></pre></notextile>