PDF commands

pdf

# split all A3 pages into A4 except first and last
a=($(ls -d *.pdf))
for f in ${a[@]} ;do
	[ "${a[1]} " != "$f " ] && [ "${a[-1]} " != "$f " ] && pdfposter -m a4 -p 2x1a4 "$f" "$f.cut"
done

# rotate +90° (mathematical) and split all pages
b=($(ls -d *.cut))
for f in ${b[@]} ;do
	pdftk $f cat 1-endwest output "$f.pdf"
done

# concatenate all well oriented pages
pdftk "${a[1]}" *.cut.pdf "${a[-1]}" cat output 1.pdf

##################################
# do all this without the last pdf
a=($(ls -d *.pdf))
for f in ${a[@]} ;do
        [ "${a[1]} " != "$f " ] && pdfposter -m a4 -p 2x1a4 "$f" "$f.cut"
done
b=($(ls -d *.cut))
for f in ${b[@]} ;do
        pdftk $f cat 1-endwest output "$f.pdf"
done
pdftk "${a[1]}" *.cut.pdf cat output 1.pdf

###################################
# optionally cut out pages 9 and 10
pdftk 1.pdf cat 1-8 11-end output a.pdf

# concatenate all files in directory alphabetically
pdftk $(ls -1|sort -h) cat output o.pdf