Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Duc review

Free#63 of 104 in Disk Space Analyzers

A scriptable, indexed disk analyzer with command-line, desktop, terminal, and web interfaces.

3.0/10Editor score
Visit Duc
Duc3.0 Visit Duc

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Duc is an open-source collection of tools for indexing, querying, and visualizing filesystem usage. It builds a database of directory and file sizes, then lets users inspect selected filesystem paths through command-line queries, an interactive ncurses interface, a graphical X11 interface, or a CGI web interface. Linux and Windows are supported, making Duc a fit for technical users who want scriptable disk analysis rather than a single desktop-only application.

Its strongest capability is the indexed workflow. After filesystem data is placed in a searchable disk-usage database, command-line tools can query files and directories without relying only on a visual interface. Include and exclude controls help define which filesystem types are indexed. Duc also supports sunburst disk-usage graphs, including clickable web graphs, and can produce XML, JSON, PNG, SVG, PDF, and HTML output. This combination suits scheduled analysis, terminal-based inspection, and workflows that need structured or rendered results.

Duc is narrower than analyzers built around visual file exploration or application inventories. Its documented graph model centers on sunburst views, while application-size and file-type reporting are outside its stated capabilities. The project also has Linux-oriented installation documentation, which may make deployment more involved for Windows users. Choose Duc when open-source licensing, indexed queries, multiple interfaces, and exportable results matter most. Choose another analyzer if treemaps, application-size views, or file-type breakdowns are central requirements.

Duc pros and cons

  • Where it wins
    • Searchable database for indexed files and directories
    • Command-line, ncurses, X11, and CGI web interfaces
    • XML, JSON, PNG, SVG, PDF, and HTML output
  • Where it doesn't
    • Visualizations focus on sunburst graphs, not treemaps
    • No application-size or file-type reporting
    • Linux-oriented installation documentation

Duc fact sheet, pricing and score →

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated · How we research and update