I can take no credit for this one other than confirming it works:

After shifting a live website to a development site to work on I was getting redirected to domain.com/wp-admin/install.php.

The issue arise if you have changed the default database prefix.

To fix simply open your wp-config.php file and update the following line to your table prefix:

$table_prefix  = 'wp_';

apt-get install ntp

Edit ntp config file:

vim /etc/ntp.conf

Update the 4 “server pool.ntp.org” lines to your locale. e.g. UK:

server 0.uk.pool.ntp.org
server 1.uk.pool.ntp.org
server 2.uk.pool.ntp.org
server 3.uk.pool.ntp.org

All zones can be found here http://www.pool.ntp.org/zone/@

Check the date/time is indeed correct:

date

Credit goes to http://wiki.debian.org/DateTime

Google Adwords Configuration

Append the following to the destination URLs of your ads: ?kw={keyword}

This will dynamically enter the keyword into your ad’s destination URL i.e. it will add what the user has searched for.

Landing Page Code

The following PHP code takes the keyword the user searched with to find your Ad and then click on it:

<?php
if ($_GET['kw'])
{
$kw = htmlentities($_GET['kw']);
}
?>
<?php
if ($_GET['kw'])
{
echo "<div id='adwords'>You searched for <b>\"".$kw."\"</b> on www.google.com.</div>";
}
?>

It lifts the keyword and displays it on screen.

Manually test with the URL the page is on – http://www.domain.com/landingpage/?kw=bigtester – You searched for “bigtester” on www.google.com should appear on screen.

Credit goes to – http://streamlinemetrics.com/blog/adwords-conversion-rate-optimization-tip-add-keyword-to-landing-page-with-dynamic-keyword-insertion.php

INSTALL AND CONFIGURE

Install the domain packages:

apt-get install opendkim opendkim-tools

Add the following to /etc/opendkim.conf:

Domain example.com
KeyFile /etc/postfix/dkim.key
Selector dkim
SOCKET inet:8891@localhost

*example.com being your domain

Add the following to /etc/default/opendkim:

SOCKET="inet:8891@localhost"

Add the following to the bottom /etc/postfix/main.cf: