Multiple choice Find the size of every directory in your current directory. du -sh ./* df -h basename -s .jpg -a *.jpg | xargs -n1 -i cp {}.jpg {}_bk.jpg find /home -mtime -1 Reveal answer Fill a bubble to check yourself A Correct answer Explanation The 'du' command (disk usage) estimates file space usage. The '-s' flag provides a summary, and '-h' makes it human-readable.