There are alot of guides that teaches you how to hide fieldgroups with hook_form_alter function. However, those only works on in-built fieldgroups, such as Author Information.

Here's a very useful function that actually hides custom fieldgroups which you have created from the Field UI:

This guide will utilize the Gitorious Chef recipe script, compiled by makewhatis. However, you should take note of the following:

In a theme's node.tpl.php, we can easily render a field view using Drupal's render().

For example, we have a field name field_integer with the label My integer. To display the field in the node.tpl.php, we can just call it out using render($content['field_integer']);, which will display like the following (Assuming it is the default manage display setting for the field):

My integer:3 200

However, what if you want to render the field in your custom module? You won't be able to use render($content['field_name']).

Is your Amazon EC2 having the similar problem below?

fsck died with exit status 8
failed (code 8).
*File system check failed.
A log is being saved in /var/log/fsck/checkfs if that location is writable.
Please repair the file system manually.
*A maintenance shell will now be started.
CONTROL-D will terminate this shell and resume system boot.
Give root password for maintenance
(or type Control-D to continue):

If you are facing this irritating problem, which not only took me hours to figure it out but also caused a little panic because it wasn't fixed although I rebooted the MySQL and the server itself - do not worry as this can be fixed very easily!