<title>Adjust authentication</title>

<para>

<command>pg_upgrade</> will connect to the old and new servers several times,

so you might want to set authentication to <literal>trust</> in

<filename>pg_hba.conf</>, or if using <literal>md5</> authentication,

use a <filename>~/.pgpass</> file (see <xref linkend="libpq-pgpass">)

to avoid being prompted repeatedly for a password.

<command>pg_upgrade</> will connect to the old and new servers several

times, so you might want to set <literal>local</> Unix-domain socket

authentication to <literal>ident</> in <filename>pg_hba.conf</> or use

a <filename>~/.pgpass</> file (see <xref linkend="libpq-pgpass">).

</para>

</step>

<title>Restore <filename>pg_hba.conf</></title>

<para>

If you modified <filename>pg_hba.conf</> to use <literal>trust</>,

restore its original authentication settings.

If you modified <filename>pg_hba.conf</>, restore its original settings.

</para>

</step>