subprocess.go

package main

import (
    "fmt"     // for printing
    "os/exec" // for executing system commands
)

func main() {

    // exec.Command() is a function that returns a
    // command that can be run in different ways, such as
    // Output(), which returns the output, or Start(), which
    // runs it but doesn't wait for it to complete. It requires
    // at least the first argument, which is the command to be run.
    // Many other options can be passed, including flags.
    cmd := exec.Command("ls")

    // run the command
    out, err := cmd.Output()

    if err != nil {

        fmt.Printf("error: %s", err)

    } else {

        fmt.Printf("%s", out)

    }
}