# Resize images in folder
$ npm install sharp-cli
$ find . -name '*.jpg' | gawk -F'.jpg' '{ printf "sharp -i \"%s\" -o ./%s-thumb.jpg resize 321 485\n", $0, $1 }' | bash

# Rename folder image in sequential order
$ find . -name '*.jpg' | gawk 'BEGIN{ a=1 }{ printf "mv \"%s\" %d.jpg\n", $0, a++ }' | bash