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<img alt="Erlang logo" src="../erlang-logo.png"><br><small><a href="users_guide.html">User's Guide</a><br><a href="../pdf/otp-system-documentation-5.7.5.pdf">PDF</a><br><a href="../index.html">Top</a></small><p><strong>Installation Guide</strong><br><strong>User's Guide</strong><br><small>Version 5.7.5</small></p>
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<h1>1 Installation</h1>
<h3><a name="id2260135">1.1
Source</a></h3>
<p>This document describes installation procedures for
binary releases. Documentation of build and installation
procedures for the source release can be found in the source
tree at the following locations:</p>
<dl>
<dt><strong>Building and Installing Erlang/OTP</strong></dt>
<dd><span class="bold_code"><a href="source/INSTALL.html"><span class="code">$ERL_TOP/INSTALL.md</span></a></span></dd>
<dt><strong>Cross Compiling Erlang/OTP</strong></dt>
<dd><span class="bold_code"><a href="source/INSTALL-CROSS.html"><span class="code">$ERL_TOP/INSTALL-CROSS.md</span></a></span></dd>
<dt><strong>How to Build Erlang/OTP on Windows</strong></dt>
<dd><span class="bold_code"><a href="source/INSTALL-WIN32.html"><span class="code">$ERL_TOP/INSTALL-WIN32.md</span></a></span></dd>
</dl>
<p>Where <span class="code">$ERL_TOP</span> is the top directory in the source tree.</p>
<h3><a name="id2258617">1.2
UNIX</a></h3>
<h4>Introduction</h4>
<p>The system is delivered as a single compressed tar file.</p>
<p>To browse the on-line HTML documentation, Netscape or an equivalent
browser supporting frames is needed.</p>
<h4>Installation Procedure</h4>
<p>When installed, the entire system, except for a small start-up
script, resides in a single directory tree. The location of this
directory tree can be chosen arbitrarily by the installer, and it
does not need to be in the user's <span class="code">$PATH</span>. The only requirements
are that the file system where it is placed has enough free space,
and that the users who run Erlang/OTP have read access to it. In the
example below, the directory tree is assumed to be located at
<span class="code">/usr/local/erlang</span>, which is here called the <strong>top-level directory</strong>.</p>
<p>It is assumed that you have the compressed tar file, the name of
which is <span class="code"><PREFIX>.tar.gz</span>, where <span class="code"><PREFIX></span> is a string
denoting the particular Erlang/OTP release, e.g.
<span class="code">otp_LXA_11930_sunos5_R9B</span>.</p>
<p>Wherever the string <span class="code"><PREFIX></span> is used below, it should
be replaced by the actual name prefix of the compressed tar file.</p>
<p>The tape archive file does not have one single directory in which
all other files are rooted. Therefore the tape archive file must be
extracted into an empty (newly created) directory.</p>
<ul>
<li>
<p>If the <strong>top-level directory</strong> does not already exist,
create it:</p>
<div class="example"><pre>
mkdir /usr/local/erlang</pre></div>
</li>
<li>
<p>Change the current directory to the <strong>top level directory</strong>:</p>
<div class="example"><pre>
cd /usr/local/erlang</pre></div>
</li>
<li>
<p>Create the <strong>installation directory</strong> with an appropriate
name. For example:</p>
<div class="example"><pre>
mkdir otp_r7b</pre></div>
</li>
<li>
<p>Change to the <strong>installation directory</strong>, e.g.</p>
<div class="example"><pre>
cd otp_r7b</pre></div>
</li>
<li>
<p>Assuming the compressed tar file resides in the directory
<span class="code"><SOME-DIR></span>,. extract the compressed tar file into the
current directory:</p>
<div class="example"><pre>
gunzip -c <SOME-DIR>/<PREFIX>.tar.gz | tar xfp -</pre></div>
</li>
<li>
<p>Read the <span class="code">README</span> file in the installation directory for
last minute updates, before proceeding.</p>
</li>
<li>
<p>Run the <span class="code">Install</span> script in the installation directory,
with the absolute path of the installation directory as argument,</p>
<div class="example"><pre>
./Install /usr/local/erlang/otp_r7b</pre></div>
<p>and supply answers to the prompts.</p>
<p>In most cases, there is a default answer in square brackets
(<span class="code">[]</span>). If the default is satisfactory, just press
<span class="code"><Return></span>. In general you are only prompted for one thing:</p>
<ul>
<li>
<p>"Do you want to use a minimal system startup instead of the
SASL startup?" <br>
In a minimal system, only the Kernel and STDLIB applications
are loaded and started. If the SASL startup is used, the SASL
application is included as well. Normally, the minimal system
is enough.</p>
</li>
</ul>
</li>
<li>
<p>Make Erlang/OTP available for users, either by putting the path
<span class="code">/usr/local/erlang/otp_r7b/bin</span> in users <span class="code">$PATH</span>
variable, or link the executable
<span class="code">/usr/local/erlang/otp_r7b/bin/erl</span> accordingly, e.g.:</p>
<div class="example"><pre>
ln -s /usr/local/erlang/otp_r7b/bin/erl /usr/local/bin/erl </pre></div>
</li>
</ul>
<h3><a name="id2252066">1.3
Windows</a></h3>
<h4>Introduction</h4>
<p>The system is delivered as a single <span class="code">.exe</span> file.</p>
<p>To browse the on-line HTML documentation, Netscape or an equivalent
browser supporting frames is needed.</p>
<h4>Installation Procedure</h4>
<p>The installation procedure is is automated. Double-click the
<span class="code">.exe</span> file icon and follow the instructions.</p>
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