Pdftk

PDF Toolkit, or pdftk for short, is a great free software command-line program for manipulating documents in the Portable Document Format (PDF). To help regular users while also supporting the author and his free software work PDF Labs now also offers (graphical) desktop versions for a mere $3.99

Manual

https://www.pdflabs.com/docs/pdftk-man-page/

Examples

http://www.pdflabs.com/docs/pdftk-cli-examples/

Discard the cover page of a pdf

pdftk wCover.pdf cat 2-end output NoCover.pdf

Collating two-sided documents

2-sided document? No problem. Scan the original face side up first (odd pages); then flip it over and scan the second (even pages). Astute people will recognized that the second document is in reverse order compared to the first document. pdfTK can not only Merge the two documents, but ALSO can reverse the second document during collation so that the pages are in order.

pdftk A=my.even.pdf B=my.odd.pdf shuffle A Bend-1 output my.full.pdf

In our example, We specify documents handles using 'A' and 'B' to make it easier to refer to them. The operator "shuffle" acts like "cat" but means to collate the documents like shuffling a deck of cards. Using the 'A' and 'B' handles, we can also specify a range, and by reversing the range that 'B' should be read from the "end" to "page 1" using the handle "Bend-1".

Discard blank pages

If you have a scan that added blank pages (every even page), and you want to get rid of those, you would ask pdftk to 'cat' pages 1-end (but only the odd ones) and 'output' that to the file of your choice.

pdftk ~/Desktop/DOC033115.pdf cat 1-endodd output ~/Desktop/ProofOfLearning.pdf