Nice, but the output isn't the same. A flame graph can show multiple levels of subdirectories at the same time, proportionally sized to their total bytes, up to a maximum of the screen hight (say, 24). Looks like ncdu can only show 1 directory level at a time.

The thing with flame graphs, pie charts and all that is that I rarely find it that useful to see multiple directory levels at the same time. Unless it is /var/log/omg-why-dont-you-rotate that occupies hundreds of gigabytes, I always end up navigating through the largest near-the-root folders with baobab just to make room for subdirectories on the screen, which is hardly different from the typical ncdu (or even 'du -hs *, then cd') workflow.

Agreed. This is usually the first thing I try when attempting to reclaim disk space. It's incredible where you find a spare gigabyte or five.

+1 to the ncdu recommendation. Of all the other tricks I've used to reclaim space, this is the most efficient. Found it when an admin of an HPC system I was using complained about my usage on the site-wide Lustre. Turns out, I had core dumps neatly tucked away in a project dir that I hadn't looked at in 3+ years.