Dut – a fast Linux disk usage calculator
"dut" is a disk usage calculator that I wrote a couple months ago in C. It is multi-threaded, making it one of the fastest such programs. It beats normal "du" in all cases, and beats all other similar programs when Linux's caches are warm (so, not on the first run). I wrote "dut" as a challenge to beat similar programs that I used a lot, namely pdu[1] and dust[2]. "dut" displays a tree of the biggest things under your current directory, and it also shows the size of hard-links under each directory as well. The hard-link tallying was inspired by ncdu[3], but I don't like how unintuitive the…
Dut – a fast Linux disk usage calculator launched on July 10, 2024 with 396 votes, #108 of 5,184 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 2 years on.
In plain words
Dut is a Linux disk usage calculator written in C that uses multithreading to analyze directory sizes faster than traditional tools like du. It displays a hierarchical tree of the largest files and folders while tracking hard-link sizes within each directory. Designed for system administrators and developers who need quick disk space analysis, dut is distributed as a single source file for easy installation and can be compiled with a single command.
written from the facts on this page · September 2026
From the sources
dut - A disk usage calculator for Linux
By default, dut will output a tree of the biggest directories it finds under your current directory. The -n 10 option limits it to 10 rows. To limit the depth shown, use -d <n> . The first column in the output tells you how much space a given entry takes up on your disk. This can be an overcount, however, because of hard links (identical files that are only stored once on the disk). Hard links under a directory are deduplicated in the first column's number, but hard links that go outside of a directory to somewhere else will still be counted here. That's where the second column comes in. It tells you how much of an entry's size is shared with other entries outside of it because of hard…from codeberg.org
In the maker’s words, at launch
"dut" is a disk usage calculator that I wrote a couple months ago in C. It is multi-threaded, making it one of the fastest such programs. It beats normal "du" in all cases, and beats all other similar programs when Linux's caches are warm (so, not on the first run). I wrote "dut" as a challenge to beat similar…
Does a similar job
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