# Coding Challenge #124 - Du

DevFeed: [Coding Challenge #124 - Du](<https://devfeed.tech/articles/coding-challenge-124-du-29200.md>)

Original publisher: [Read original article](<https://codingchallenges.substack.com/p/coding-challenge-124-du>)

Author: John Crickett

Published: 2026-06-13T08:01:14Z

Content type: tutorial

Language: en

Sources: [Coding Challenges](<https://devfeed.tech/sources/coding-challenges.md>)

Topics: [Code Challenge](<https://devfeed.tech/topics/code-challenge.md>), [POSIX](<https://devfeed.tech/topics/posix.md>), [Unix](<https://devfeed.tech/topics/unix.md>), [Utility Software](<https://devfeed.tech/topics/utility.md>), [Programming](<https://devfeed.tech/topics/programming.md>)

Tags: [coding](<https://devfeed.tech/tags/coding.md>), [exercise](<https://devfeed.tech/tags/exercise.md>), [filesystem](<https://devfeed.tech/tags/filesystem.md>), [posix](<https://devfeed.tech/tags/posix.md>), [programming](<https://devfeed.tech/tags/programming.md>), [programming-language](<https://devfeed.tech/tags/programming-language.md>), [run](<https://devfeed.tech/tags/run.md>), [unix](<https://devfeed.tech/tags/unix.md>), [utilities](<https://devfeed.tech/tags/utilities.md>)

## AI overview

A coding challenge asks readers to build their own POSIX-compatible du utility. It covers recursively traversing directories, calculating disk usage, handling hard links and symbolic links, and presenting results in multiple formats.

## Source excerpt

This challenge is to build your own du.