package main
 
 import (
  "fmt"
  "io/ioutil"
  "os/exec"
 )
 
 func main() {
  cmd := exec.Command("/bin/bash", "-c", `df -lh`)
 
  //创建获取命令输出管道
  stdout, err := cmd.StdoutPipe()
  if err != nil {
   fmt.Printf("Error:can not obtain stdout pipe for command:%s\n", err)
   return
  }
 
  //执行命令
  if err := cmd.Start(); err != nil {
   fmt.Println("Error:The command is err,", err)
   return
  }
 
  //读取所有输出
  bytes, err := ioutil.ReadAll(stdout)
  if err != nil {
   fmt.Println("ReadAll Stdout:", err.Error())
   return
  }
 
  if err := cmd.Wait(); err != nil {
   fmt.Println("wait:", err.Error())
   return
  }
  fmt.Printf("stdout:\n\n %s", bytes)
 }

 package main
 
 import (
  "bufio"
  "fmt"
  "os/exec"
 )
 
 func main() {
  cmd := exec.Command("/bin/bash", "-c", `df -lh`)
 
  //创建获取命令输出管道
  stdout, err := cmd.StdoutPipe()
  if err != nil {
   fmt.Printf("Error:can not obtain stdout pipe for command:%s\n", err)
   return
  }
 
  //执行命令
  if err := cmd.Start(); err != nil {
   fmt.Println("Error:The command is err,", err)
   return
  }
 
  //使用带缓冲的读取器
  outputBuf := bufio.NewReader(stdout)
 
  for {
 
   //一次获取一行,_ 获取当前行是否被读完
   output, _, err := outputBuf.ReadLine()
   if err != nil {
 
    // 判断是否到文件的结尾了否则出错
    if err.Error() != "EOF" {
     fmt.Printf("Error :%s\n", err)
    }
    return
   }
   fmt.Printf("%s\n", string(output))
  }
 
  //wait 方法会一直阻塞到其所属的命令完全运行结束为止
  if err := cmd.Wait(); err != nil {
   fmt.Println("wait:", err.Error())
   return
  }
 }

 # command-line-arguments
 ./exec_command.go:36: cannot convert err (type error) to type string

 type error interface {
  Error() string
 }