How to start with RUST LANG in linux machine

I am started hearing about RUST programming language http://doc.rust-lang.org/book/README.html, so thought of give a try 'helloworld' program. The impressive thing is,the language focus on safety,speed and concurrency.

Rust is a systems programming language focused on three goals: safety, speed, and concurrency. It maintains these goals without having a garbage collector, making it a useful language for a number of use cases other languages aren’t good at: embedding in other languages, programs with specific space and time requirements, and writing low-level code, like device drivers and operating systems

There is very good documentation - http://doc.rust-lang.org

Below is the installation steps, helloworld program . I gave a 'Strace' on the program to see any difference.I couldn't understand any difference :-).. i dont know how to find the difference in speed or concurrency.. need to read more ...