ohmu is a space usage visualizer or analyzer. Unfortunately, it’s not interactive, you can only view from one directory and anything underneath it in each run. Eventually, it would get overcrowded if it’s a big directory with lots of files and directories.

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Ohmu on its package

It scans through the contents and updates the result, so you can actually watch Ohmu going through directory by directory, file by file, a responsive visualization. You can hit q any time you want to quit the program.

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Ohmu on a bigger directory

The representation of each block — file or directory — is well-thought, the size is the file size in proportion, and if the space is too small, you can see the ASCII-style of arrows, such as <>. However, I found the name of this program is the most interesting part, try to search images with keyword “ohmu.” Not sure if it’s named after that fictional creature.

ohmu was written by Paul Nechifor on 2015-07-19 in Python 2 with ncurses, currently post v0.1.0 (2015-07-19), under the MIT License. If you are looking for a simpler version, try Kjetil Erga’s Storage Chart.