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- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>1.1. Installation</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="tutorial-start.html" title="Chapter 1. Getting Started" /><link rel="next" href="tutorial-arch.html" title="1.2. Architectural Fundamentals" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">1.1. Installation</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="tutorial-start.html" title="Chapter 1. Getting Started">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="tutorial-start.html" title="Chapter 1. Getting Started">Up</a></td><th width="60%" align="center">Chapter 1. Getting Started</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 12.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="tutorial-arch.html" title="1.2. Architectural Fundamentals">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="TUTORIAL-INSTALL"><div class="titlepage"><div><div><h2 class="title" style="clear: both">1.1. Installation</h2></div></div></div><p>
- Before you can use <span class="productname">PostgreSQL</span> you need
- to install it, of course. It is possible that
- <span class="productname">PostgreSQL</span> is already installed at your
- site, either because it was included in your operating system
- distribution or because the system administrator already installed
- it. If that is the case, you should obtain information from the
- operating system documentation or your system administrator about
- how to access <span class="productname">PostgreSQL</span>.
- </p><p>
- If you are not sure whether <span class="productname">PostgreSQL</span>
- is already available or whether you can use it for your
- experimentation then you can install it yourself. Doing so is not
- hard and it can be a good exercise.
- <span class="productname">PostgreSQL</span> can be installed by any
- unprivileged user; no superuser (<span class="systemitem">root</span>)
- access is required.
- </p><p>
- If you are installing <span class="productname">PostgreSQL</span>
- yourself, then refer to <a class="xref" href="installation.html" title="Chapter 16. Installation from Source Code">Chapter 16</a>
- for instructions on installation, and return to
- this guide when the installation is complete. Be sure to follow
- closely the section about setting up the appropriate environment
- variables.
- </p><p>
- If your site administrator has not set things up in the default
- way, you might have some more work to do. For example, if the
- database server machine is a remote machine, you will need to set
- the <code class="envar">PGHOST</code> environment variable to the name of the
- database server machine. The environment variable
- <code class="envar">PGPORT</code> might also have to be set. The bottom line is
- this: if you try to start an application program and it complains
- that it cannot connect to the database, you should consult your
- site administrator or, if that is you, the documentation to make
- sure that your environment is properly set up. If you did not
- understand the preceding paragraph then read the next section.
- </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="tutorial-start.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="tutorial-start.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="tutorial-arch.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 1. Getting Started </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> 1.2. Architectural Fundamentals</td></tr></table></div></body></html>
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