$ ls *pdf | awk '{print "convert -resize 240x240 "$1"[0] img/"$1".jpg"}' > x $ sh -x + convert -resize 240x240 XXX.pdf[0] xxx.jpg $ ls img/*jpg | awk '{print "<a href=\"Z"$1"pdf\"><img src=\""$1"\">"}' | sed -e "s/Zimg\///g" | sed -e "s/jpgpdf/pdf/g" > index.html