Logging into the admin for your Magento 1.6 website is easy. Where ever you installed Magento, simply add /admin to the URL. If your magento site is not using friendly url then you can add /index.php/admin
http://magentoexpertforum.com/i/2013...n_log_in_1.jpg
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Go to your Magento website. Add /admin to the URL and reload the page
Type in your username and password that you set up during the installation process
You’re now logged into your Magento Admin panel.