# 지정된 디렉터리 및 하위 디렉터리의 전체 용량 출력
secu@secu-VirtualBox:~$ du -sh
8.6M

# KB 단위로 파일 시스템별 용량 출력
secu@secu-VirtualBox:~$ df -k
Filesystem     1K-blocks    Used Available Use% Mounted on
udev              474020       0    474020   0% /dev
tmpfs             100488    1320     99168   2% /run
/dev/sda5        9736500 6489212   2732984  71% /
tmpfs             502436       0    502436   0% /dev/shm
tmpfs               5120       4      5116   1% /run/lock
tmpfs             502436       0    502436   0% /sys/fs/cgroup
/dev/loop2        261760  261760         0 100% /snap/gnome-3-34-1804/36
/dev/loop0         56320   56320         0 100% /snap/core18/1880
/dev/loop3        223232  223232         0 100% /snap/gnome-3-34-1804/60
/dev/loop1         56704   56704         0 100% /snap/core18/1932
/dev/loop4         63616   63616         0 100% /snap/gtk-common-themes/1506
/dev/loop7         31872   31872         0 100% /snap/snapd/10492
/dev/loop5         52352   52352         0 100% /snap/snap-store/498
/dev/loop6         66432   66432         0 100% /snap/gtk-common-themes/1514
/dev/loop8         51072   51072         0 100% /snap/snap-store/467
/dev/loop9         30720   30720         0 100% /snap/snapd/8542
/dev/sda1         523248       4    523244   1% /boot/efi
tmpfs             100484      20    100464   1% /run/user/1000