Ubuntu has been replacing core utilities with Rust rewrites, and it’s now completed the process.

cp, mv and rm were held back on their GNU versions in Ubuntu 26.04 LTS due to a crop of TOCTOU (time-of-check to time-of-use) issues that needed to be fixed in the uutils versions. 

With those issues resolved upstream, Ubuntu 26.10 finishes the job. The ‘Stonking Stingray’ ships a full set of Rust core utilities, which encompasses common command-line tools like ls, cat, chmod and  du.

↫ Joey Sneddon at OMG! Ubuntu

I’m definitely not qualified enough to make any useful remarks about this, but the idea of replacing such foundational, battle-tested utilities with brand new ones, even when written in a memory-safe language, does make feel a little hesitant. Still, at least this way Ubuntu users can work out any issues so that if and when other distributions – like the one I use, Fedora – follows suit.