如何使用Go语言实现远程执行命令

import ( 
 "fmt"
 "time"

 "golang.org/x/crypto/ssh"
)

func connect(user, password, host string, port int) (*ssh.Session, error) { 
 var (
 auth  []ssh.AuthMethod
 addr  string
 clientConfig *ssh.ClientConfig
 client *ssh.Client
 session *ssh.Session
 err  error
 )
 // get auth method
 auth = make([]ssh.AuthMethod, 0)
 auth = append(auth, ssh.Password(password))

 clientConfig = &ssh.ClientConfig{
 User: user,
 Auth: auth,
 Timeout: 30 * time.Second,
 }

 // connet to ssh
 addr = fmt.Sprintf("%s:%d", host, port)

 if client, err = ssh.Dial("tcp", addr, clientConfig); err != nil {
 return nil, err
 }

 // create session
 if session, err = client.NewSession(); err != nil {
 return nil, err
 }

 return session, nil
}

import ( 
 "fmt"
 "log"
 "os"
 "time"

 "golang.org/x/crypto/ssh"
)

func main() { 
 session, err := connect("root", "xxxxx", "127.0.0.1", 22)
 if err != nil {
 log.Fatal(err)
 }
 defer session.Close()

 session.Run("ls /; ls /abc")
}

func main() { 
 session, err := connect("root", "xxxxx", "127.0.0.1", 22)
 if err != nil {
 log.Fatal(err)
 }
 defer session.Close()

 session.Stdout = os.Stdout
 session.Stderr = os.Stderr
 session.Run("ls /; ls /abc")
}

func main() { 
 session, err := connect("root", "olordjesus", "dockers.iotalabs.io", 2210)
 if err != nil {
 log.Fatal(err)
 }
 defer session.Close()

 fd := int(os.Stdin.Fd())
 oldState, err := terminal.MakeRaw(fd)
 if err != nil {
 panic(err)
 }
 defer terminal.Restore(fd, oldState)

 // excute command
 session.Stdout = os.Stdout
 session.Stderr = os.Stderr
 session.Stdin = os.Stdin

 termWidth, termHeight, err := terminal.GetSize(fd)
 if err != nil {
 panic(err)
 }

 // Set up terminal modes
 modes := ssh.TerminalModes{
 ssh.ECHO:  1, // enable echoing
 ssh.TTY_OP_ISPEED: 14400, // input speed = 14.4kbaud
 ssh.TTY_OP_OSPEED: 14400, // output speed = 14.4kbaud
 }

 // Request pseudo terminal
 if err := session.RequestPty("xterm-256color", termHeight, termWidth, modes); err != nil {
 log.Fatal(err)
 }

 session.Run("top")
}