Split and merge PDFs with pdftk
Update: Unfortunately, pdftk seems no longer to be maintained for Fedora 21. So if you’re having problems getting hold of it, try the alternative utility poppler-utils. You can find the guide at http://jorge.fbarr.net/2015/02/20/split-and-merge-pdfs-part-2/.
First install it:
Then use it:
Merge
Split
A very handy tool.