sudo ncdu /
ncdu 1.14.1 ~ Use the arrow keys to navigate, press ? for help
--- / --------------------------------------------------------------------------
    2.2 TiB [##########] /mnt
    4.0 GiB [          ]  swap.img
    3.5 GiB [          ] /usr
    2.9 GiB [          ] /var
    1.5 GiB [          ] /snap
  203.7 MiB [          ] /boot
  111.0 MiB [          ] /home
    8.1 MiB [          ] /etc
    3.1 MiB [          ] /run
  340.0 KiB [          ] /root
   64.0 KiB [          ] /tmp
e  16.0 KiB [          ] /lost+found
e   4.0 KiB [          ] /srv
e   4.0 KiB [          ] /opt
e   4.0 KiB [          ] /media
e   4.0 KiB [          ] /cdrom
    4.0 KiB [          ]  udo service smbd restart
.   0.0   B [          ] /proc
    0.0   B [          ] /sys
    0.0   B [          ] /dev
@   0.0   B [          ]  libx32
 Total disk usage:   2.2 TiB  Apparent size:   2.2 TiB  Items: 635225