QDirStat is a graphical application to show where your disk space has gone and to help you to clean it up.

This is a Qt-only port of the old Qt3/KDE3-based KDirStat, now based on the latest Qt 5. It does not need any KDE libs or infrastructure. It runs on every X11-based desktop on Linux, BSD and other Unix-like systems and of course in a Docker container.

QDirStat has a number of new features compared to KDirStat. To name a few:

- Multi-selection in both the tree and the treemap.
- Unlimited number of user-defined cleanup actions.
- Properly show errors of cleanup actions (and their output, if desired).
- Configurable file categories (MIME types), treemap colors, exclude rules, tree columns.

- Package manager support:
- Show what software package a system file belongs to.
- Packages view showing disk usage of installed software packages and their individual files.
- Unpackaged files view showing what files in system directories do not belong to any installed software package.

- New views:
- Disk usage per file type (by filename extension).
- File size histogram view.
- File age view
- Free, used and reserved disk size for each mounted filesystem (like df)

For more details and screenshots, see

https://github.com/shundhammer/qdirstat

and the local documentation in

/usr/share/doc/packages/qdirstat/README.md