This script removes the watermark from various guides.
For it to work you must first get the following tools (assuming you have RHEL 6.x):

  - qpdf (http://qpdf.sourceforge.net)
    compile and install from source code.

  - pdftk (https://www.pdflabs.com/tools/pdftk-the-pdf-toolkit)
    install rpm file for you distribution, i.e. pdftk-2.02-1.el6.x86_64.rpm

  - exiftool (http://www.sno.phy.queensu.ca/~phil/exiftool)
    perl library, compile and install from source code.

After installing these tools you need to set the following variables when modifying the script via any text editor:

  QPDF="/path/to/qpdf"
  PDFTK="/path/to/pdftk"
  EXIFTOOL="/path/to/exiftool"

That's it for setting up the script to work.
Help message:

	strip_watermarks - remove watermarks from guides.

        strip_watermarks.sh [-h] -i <INPUT_FILE>

        -h - print this message.
        -i - input filename.

	Example:

	$ ./strip_watermarks.sh -i file.pdf
	Removing watermark(s) from file.pdf...
	Done! Saved to "file_nw.pdf"