PDF Tools
From RobolaboWiki
Reduce PDFs size
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf
Merge PDFs
gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=OUTPUT_FILE1.pdf INPUT_FILE1.pdf INPUT_FILE2.pdf
Cut PDFs
pdfnup INPUT_FILE.pdf '1-21' --nup 1x1 --no-landscape --outfile OUTPUT_FILE.pdf
PDF Printer
Install cups-pdf
apt-get install cups-pdf
Go to System -> Administration -> Printing and then Printer ->Add Printer.
Select Local Printer -> PDF Printer
Model PostScript