[ Thanks to dave for
this link. ]
“Pdftk
“If PDF is electronic paper, then pdftk is an electronic
staple-remover, hole-punch, binder, secret-decoder-ring, and
X-Ray-glasses. Pdftk is a simple tool for doing everyday things
with PDF documents. Keep one in the top drawer of your desktop and
use it to:Merge PDF Documents
Split PDF Pages into a New Document
Rotate PDF Pages or Documents
Decrypt Input as Necessary (Password Required)
Encrypt Output as Desired
Fill PDF Forms with FDF Data or XFDF Data and/or Flatten Forms
Apply a Background Watermark or a Foreground Stamp”