fix create INBOX folder problem in Thunderbird

When using Thunderbird with IMAP folders, you may encounter the fact that INBOX folders are created in the IMAP directory when moving messages to Trash.
One way to fix this is to use the Config Editor (Preferences > General menu) and search for "trash_folder_name". The value of can be something like INBOX/Trash, and it should be changed to Trash.
You should restart Thunderbird for the changes to take effect.
Reference: http://superuser.com/questions/278745/thunderbird-creates-a-folder-called-inbox-on-imap

prevent updates in ubuntu

To prevent the update of certain packages in Ubuntu, you can use Synaptic to lock those packages. This is accomplished by selecting the package and then choosing Package > Lock version from the menu.

For example, in order to prevent kernel updates, the following packages should be locked:
- linux-headers-generic
- linux-image-generic
- linux-headers-generic-pae
- linux-generic