du

Disk usage: estimate and summarize file and directory space usage. More information: https://keith.github.io/xcode-man-pages/du.1.html.

du -k|m|g path/to/directory

du -h path/to/directory

du -sh path/to/directory

du -ah path/to/directory

du -h -d 2 path/to/directory

du -ch */*.jpg