Shell script manipulation - Collection

rotate.sh

#!/bin/bash
for file in ~/Pictures/Lex/*.png; do
  convert "$file" -rotate 270 "${file%.png}"_rotated.png
done

shrink_pdf.sh

#!/bin/bash
# Shrink PDF shell command
gs -sDEVICE=pdfwrite          \
   -dCompatibilityLevel=1.4   \
   -dPDFSETTINGS=/screen      \
   -dNOPAUSE                  \
   -dQUIET                    \
   -dBATCH                    \
   -sOutputFile="output.pdf"  \
   "input.pdf"