mv in Ubuntu 26.10 does not preserve mtime when moving across devices—a comparison with GNU

Knowing that cp, mv, and rm in Ubuntu 26.10 have been replaced by the Rust-based uutils coreutils 0.12.0, I compared them ...

Why a Sudoku-solving program looks smart: Recursion, backtracking, and the idea of 'trying from the most likely failure points'

I was thinking about a program to solve Sudoku.You fill a 9x9 grid with numbers from 1 to 9. The same number must not be ...