dua-cli is both an executable binary that can be run, and a library that can be used in Rust programs.
Installing the dua executable
Assuming you have Rust/Cargo installed, run this command in a terminal:
cargo install dua-cli
It will make the dua command available in your PATH if you've allowed the PATH to be modified when installing Rust. cargo uninstall dua-cli uninstalls.
Adding dua library as a dependency
Run this command in a terminal, in your project's directory:
cargo add dua-cli
To add it manually, edit your project's Cargo.toml file and add to the [dependencies] section:
dua-cli = "2.33.0"
The dua library will be automatically available globally.
Read the dua library documentation.