Thumbnails

1. !/bin/sh
2. For every .jpg in a directory, create a thumbnail (smaller) image at 280 pixels high (or comment out, uncomment similar line, for width: )
3. Resize to 280 pixels height

for file in *.jpg; do convert -resize x280 "$file" "t$file"; done

1. resize to 280 pixels width
2. for file in *.jpg; do convert -resize 280 "$file" "t$file"; done