for f in *.tif
do
  echo "Processing $f"
gdaldem hillshade $f $f-hillshade" -z 1.0 -s 1.0 -az 315.0 -alt 45.0 -compute_edges -of GTiff
done

for f in *.tif
do
  echo "Processing $f"
gdaldem hillshade $f $f-hillshade -z 1.0 -s 1.0 -az 315.0 -alt 45.0 -compute_edges -of GTiff
done