go如何执行linux命令

package main

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


func main() {
  cmd0 := exec.Command("echo", "-n", "my first command")
  //启动命令
  if err := cmd0.Start(); err != nil {
  fmt.Printf("command can not start %s \n", err)
  return
  }

  //获取输出管道
  stdout0, err := cmd0.StdoutPipe()
  if err != nil {
  fmt.Printf("couldn't stdout pipe for command %s \n", err)
  return
  }
  var outputBuf0 bytes.Buffer
  for {
  tempOutput := make([]byte, 2048)
  n, err := stdout0.Read(tempOutput)
  if err != nil {
    if err == io.EOF {
    break
    } else {
    fmt.Printf("couldn't read data from pip %s \n", err)
    return
    }
  }
  if n > 0 {
    outputBuf0.Write(tempOutput[:n])
  }
  }
  fmt.Printf("%s\n", outputBuf0.String())
}