Run command in Rust 1.55

In Rust, you can run a command through the command line interface or directly from a Rust program.

To run a command in Rust via the command line interface, follow these steps:

1. Open your terminal or command prompt.
2. Navigate to the directory containing your Rust project.
3. Type cargo run -- followed by the command you want to run. For example, if you want to run the ls command to list all files in the current directory, you would type cargo run -- ls.

Here's an example of running the ls command in Rust 1.55 via the command line interface:

$ cargo run -- ls
    Finished dev [unoptimized + debuginfo] target(s) in 0.06s
     Running ls
Cargo.lock  Cargo.toml  src  target

Note that the cargo run -- prefix is used to build and run the Rust program, and the ls command is passed as an argument to the Rust program.

To run a command directly from a Rust program, use the std::process::Command module. Here's an example of running the ls command via Rust code:

use std::process::Command;
fn main() {

    let output = Command::new("ls")

                    .output()

                    .expect("failed to execute command");
println!("stdout: {}", String::from_utf8_lossy(&output.stdout));

    println!("stderr: {}", String::from_utf8_lossy(&output.stderr));

}

This code creates a Command object with the ls command, executes it, and stores the output in the output variable. The String::from_utf8_lossy function is used to print the output as a string.

Running this code would produce output similar to the command line interface example:

stdout: Cargo.lock
Cargo.toml
src
target
stderr: 

Note that the Command::new method takes the command as a string argument, and the output method is used to run the command and capture its output. The expect method is used to handle any errors that may occur during command execution.