Dealing with PDF with pdftk

pdftk is a tool that can help you to manipulate PDF files even though you don't have Acrobat installed. The most common usage is to merge/split PDF files.

General syntax:

pdftk <input PDF files> cat [ <input PDF pages> ] output <output PDF filename>


Example

• Extract page 1-3 from in1.pdf and save as out.pdf
  pdfhk A=in1.pdf cat A1-3 output out.pdf
• Extract page 1-3 from in1.pdf, page 4-6 from in2.pdf, merge it and save as out.pdf
  pdfhk A=in1.pdf B=in2.pdf cat A1-3 B4-6 output out.pdf
• Extract page1 from in2.pdf, and every even pages (2,4,6...) of in1.pdf, merge it and save as out.pdf
  pdftk A=in1.pdf B=in2.pdf cat B1 A1-endeven output out.pdf

Actually pdftk can also rotate, encrypt/decrypt and do more. Details usage can refer the link below.

Ref: http://www.pdfhacks.com/pdftk/