sudo apt install ncdu
To scan the entire system, use the command below
sudo ncdu -x \
https://www.networkworld.com/article/3644415/looking-at-linux-disk-usage-with-the-ncdu-command.html
https://www.networkworld.com/article/3693090/using-ncdu-to-view-your-disk-usage-while-grasping-those-tib-gib-mib-and-kib-file-sizes.html#tk.rss_all
https://www.both.org/?p=4639