Spilit a pdf into many parts

Hi friend,
you can spilit your pdf into as many as part you want, but you have to install "pdftk" package for ubuntu (LINUX), and try below command..

pdftk A=known.pdf cat A1-120 output combined.pdf

where A=known.pdf, is your pdf which you want to spilit into parts, and cat A1-120 is page number, from page 1 to 120 you want to spilit the existing pdf.

for more information you can use below link also:
http://www.accesspdf.com/pdftk/