how do i get libre office base because it was not installed in my office package?

i have got all the other features of libre office but i need base for my use. so help me to get base.

This answer (and others from the same thread) could help you: http://ask.libreoffice.org/en/question/2464/singular-download-question/?answer=4170#post-id-4170

Could you precise your OS ?

linux-ubuntu 12.04 LTS brother