[root@debian aegir]$ /etc/init.d/apache2 restart
Restarting web server: apache2 ... waiting (98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
Action 'start' failed.
The Apache error log may have more information.
 failed!

<?php
$aliases['hostmaster'] = array (
  'context_type' => 'site',
  'platform' => '@platform_hostmaster6x20rc2',
  'server' => '@server_master',
  'db_server' => '@server_master',
  'uri' => 'aegir.rockdiamond.net',
  'root' => '/var/aegir/hostmaster-6.x-2.0-rc2',
  'site_path' => '/var/aegir/hostmaster-6.x-2.0-rc2/sites/aegir.rockdiamond.net',
  'site_enabled' => true,
  'language' => 'en',
  'client_name' => 'admin',
  'aliases' =>
  array (
    0 => '173.255.196.148',
  ),
  'redirection' => '1',
  'cron_key' => '',
  'profile' => 'hostmaster',
);