PDF 處理工具 : pdftk

!!! 注意：PDF 檔名不能有中文 !!!

• Merge Two or More PDFs into a New Document

pdftk 1.pdf 2.pdf 3.pdf cat output 123.pdf

or (Using Handles):
pdftk A=1.pdf B=2.pdf cat A B output 12.pdf

or (Using Wildcards):
pdftk *.pdf cat output combined.pdf

• Split Select Pages from Multiple PDFs into a New Document

pdftk A=one.pdf B=two.pdf cat A1-7 B1-5 A8 output combined.pdf

• Rotate the First Page of a PDF to 90 Degrees Clockwise

pdftk in.pdf cat 1E 2-end output out.pdf

• Rotate an Entire PDF Document's Pages to 180 Degrees

pdftk in.pdf cat 1-endS output out.pdf

Reference:
http://www.accesspdf.com/pdftk/