<refsect1>

<title>Environment</title>

<para>

Some environment variables can be used to provide defaults for command-line options:

<variablelist>

<varlistentry>

<term><envar>PGBINOLD</envar></term>

<listitem>

<para>

The old PostgreSQL executable directory; option

<option>-b</option>/<option>--old-bindir</option>.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><envar>PGBINNEW</envar></term>

<listitem>

<para>

The new PostgreSQL executable directory; option

<option>-B</option>/<option>--new-bindir</option>.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><envar>PGDATAOLD</envar></term>

<listitem>

<para>

The old database cluster configuration directory; option

<option>-d</option>/<option>--old-datadir</option>.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><envar>PGDATANEW</envar></term>

<listitem>

<para>

The new database cluster configuration directory; option

<option>-D</option>/<option>--new-datadir</option>.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><envar>PGPORTOLD</envar></term>

<listitem>

<para>

The old cluster port number; option

<option>-p</option>/<option>--old-port</option>.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><envar>PGPORTNEW</envar></term>

<listitem>

<para>

The new cluster port number; option

<option>-P</option>/<option>--new-port</option>.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><envar>PGSOCKETDIR</envar></term>

<listitem>

<para>

Directory to use for postmaster sockets during upgrade; option

<option>-s</option>/<option>--socketdir</option>.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><envar>PGUSER</envar></term>

<listitem>

<para>

Cluster's install user name; option

<option>-U</option>/<option>--username</option>.

</para>

</listitem>

</varlistentry>

</variablelist>

</para>

</refsect1>