This video at min 22
https://www.youtube.com/watch?v=0NDyopLKE1w
https://www.eriwen.com/tools/grep-is-a-beautiful-tool/
grep -r h[1-6] ./*.css | wc -l
grep -r h[1-6] app/assets/stylesheets/*.*css | wc -l
grep -r font-size app/assets/stylesheets/*.*css | wc -l
grep -r margin app/assets/stylesheets/*.*css | wc -l
grep -r padding app/assets/stylesheets/*.*css | wc -l
grep -r padding:0 app/assets/stylesheets/*.*css | wc -l
grep -r margin:0 app/assets/stylesheets/*.*css | wc -l
grep -r important app/assets/stylesheets/*.*css | wc -l
grep -r color app/assets/stylesheets/*.*css | wc -l
grep -r background app/assets/stylesheets/*.*css | wc -l
Other tags: left, height, width, position, right, float, display