test.go

package main

import (
    "os"
    "os/exec"
    "bytes"
    "log"
    "fmt"
)

func main(){
    err := os.Chdir("/tmp")

    if err != nil {
        log.Fatal(err)
    }

    cmd := exec.Command("ls")
    var out bytes.Buffer
    cmd.Stdout = &out

    err = cmd.Run()
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("%q\n", out.String())
}