bash_oneliner.txt

for i in `ls`; do echo $i; convert $i -resize 300x225 thumb_$i; done

gs -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sPAPERSIZE=a4 -sOutputFile=out.pdf scan0014.pdf scan0015.pdf scan0016.pdf

$ sudo mount -o loop disk.iso ./mount_iso
$ cp ./mount_iso/file.jpg /tmp