Various useful PDF manipulation commands

Posted on Thu 20 February 2020 in linux • 2 min read

Merging and rotating PDFs

Merging PDFs can be easily done with pdftk. You can also use this tool to select only specific pages from your document or rotate pages. This is my go-to tool if I don't have to manipulate pages beyond rotation.

To concatenate all PDFs in the working directory use

pdftk *.pdf cat output filename.pdf

To select only pages 1-3 and 5 from one document use

pdftk input.pdf cat 1-3 5 output filename.pdf

Rotation can be done with the rotate subcommand, see the manpage for details.

Printing in special arrangements

Assuming you have a PDF and want to print that as a brochure or you want to print one A5 page two times on an A4 page. A useful tool for that is pdfjam, which you might already have installed. At least in Archlinux it is included in the texlive-core package.

Brochure or Book printing of a document

pdfbook input.pdf

Print single page A5 document two times on A4 sheet

pdfjam --nup 2x1 --landscape --outfile out.pdf input.pdf input.pdf

This can also be done as a script which handles input file rotation correctly

#!/bin/zsh

infile="$1"
outfile="$2"
[[ -z $infile ]] && echo 'Input file required!' && exit 2
[[ -z $outfile ]] && echo 'Output file required!' && exit 3
[[ $(pdfinfo $infile | grep Pages | grep -o '[0-9]\+') -gt 1 ]] && echo 'One single page documents!' && exit 1

wdir=$(mktemp -d)

dims=("${(@f)$(pdfinfo $infile | grep 'Page size' | grep -o '[0-9]\+\.[0-9]\+')}")
landscape=$(bc <<< "$dims[1] >= $dims[2]")

if [ $landscape -eq 1 ]
then
    pdfjam --angle 90 --fitpaper true --rotateoversize true --quiet --outfile $wdir/rot.pdf $infile
else
    cp $infile $wdir/rot.pdf
fi

pdfjam --nup 2x1 --landscape --quiet --outfile $wdir/out.pdf $wdir/rot.pdf $wdir/rot.pdf

if [ $landscape -eq 1 ]
then
    pdfjam --angle 270 --fitpaper true --rotateoversize true --quiet --outfile $outfile $wdir/out.pdf
else
    cp $wdir/out.pdf $outfile
fi

rm -rf $wdir

which can be used easily like

./a5-to-double-a4 input.pdf out.pdf

In the script above some rotation commands are also used: pdf90 and pdf270