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Rust coreutils with Sylvestre Ledru
Published 2 Mar 2026
Duration: 31:06
A modern rewrite of Unix command-line tools using Rust aims for memory safety, performance, and maintainability while achieving high compatibility.
Episode Description
Josh talks to Sylvestre Ledru about the Rust coreutils project. We've been using GNU coreutils for decades now, and the goal of Rust coreutils is to r...
Overview
The podcast explores Rust Core Utils, a modern rewrite of fundamental Unix command-line tools like ls, cp, and mv, originally developed in C. The project, revived by Sylvest Ledoux and now included by default in Ubuntu, aims to enhance system utilities using Rusts memory safety, performance, and modern language features. The goal is to create safer, more maintainable tools while preserving compatibility with existing Unix workflows and scripts. Early challenges included addressing script compatibility issues due to undocumented behaviors in GNU Core Utils, but the team achieved 95-96% compatibility through rigorous testing, including running GNUs upstream test suite and contributing improvements to the ecosystem.
The project emphasizes collaboration with GNU to resolve edge cases, such as handling calendar systems and deprecated arguments, while also highlighting Rusts appeal to new developers and its potential to modernize critical infrastructure. Current efforts focus on refining rare corner cases, improving cross-platform support, and ensuring long-term compatibility. Looking ahead, the team aims for broader adoption in Linux distributions and continued community-driven contributions to sustain the projects growth and reliability.
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