Thunderbird: import or using of saved or backup folder in new instance in Linux

To back-up the thunderbird email client files with all email accounts
    Copy the entire .thunderbird folder from the filesystem (normally it is located at /home/<username>/.thunderbird) into some safe place (ie. other than the Operating System partition).

To restore the saved files in new Operating System or newly installed thunderbird client or in some other systems.

1. Install the thunderbird client (ie. apt-get install thunderbird)
2. Run the client from menu or from console once. (ie. let the programe to create neccessary folders on the path) and close it by not making any changes like new account configuration)
3. Move the .thunderbird folder to somewhere or rename it like
   
   $ mv /home/<username>/.thunderbird /home/<username>/.thunderbird.org
   
4. Let /Data/.thunderbird was the saved folder of thunderbird, then
   
   $ ln -s /Data/.thunderbird /home/<username>/.thunderbird
   
5. Run the thunderbird to load the old mails and further use.

Note : This is tested under Ubuntu 10.x and 11.x