ahmed-musallam:: How to compress a PDF with ghostscript

gs -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pdfwrite \
-dCompatibilityLevel=1.3 -dPDFSETTINGS=/screen -\
dEmbedAllFonts=true -dSubsetFonts=true \
-dColorImageDownsampleType=/Bicubic \
-dColorImageResolution=144 \
-dGrayImageDownsampleType=/Bicubic -dGrayImageResolution=144 \
-dMonoImageDownsampleType=/Bicubic -dMonoImageResolution=144 \
-sOutputFile=out.pdf inputfile.pdf