使用包：golang.org/x/crypto/ssh

以下封裝一個發送命令的Cli結構體

type Cli struct {
    IP         string      //IP地址
    Username   string      //用戶名
    Password   string      //密碼
    Port       int         //端口號
    client     *ssh.Client //ssh客戶端
    LastResult string      //最近一次Run的結果
}

//創建命令行對象
//@param ip IP地址
//@param username 用戶名
//@param password 密碼
//@param port 端口號,默認22
func New(ip string, username string, password string, port ...int) *Cli {
    cli := new(Cli)
    cli.IP = ip
    cli.Username = username
    cli.Password = password
    if len(port) <= 0 {
        cli.Port = 22
    } else {
        cli.Port = port[0]
    }
    return cli
}

//執行shell
//@param shell shell腳本命令
func (c Cli) Run(shell string) (string, error) {
    if c.client == nil {
        if err := c.connect(); err != nil {
            return "", err
        }
    }
    session, err := c.client.NewSession()
    if err != nil {
        return "", err
    }
    defer session.Close()
    buf, err := session.CombinedOutput(shell)

    c.LastResult = string(buf)
    return c.LastResult, err
}

測試執行shell代碼

    cli := New("IP", "用戶名", "密碼", 端口號)
    output, err := cli.Run("free -h")
    fmt.Printf("%v\n%v", output, err)

還有類似top或者vim的命令是需要交互的，可以利用包golang.org/x/crypto/ssh/terminal實現

再封裝一個方法RunTerminal

//執行帶交互的命令
func (c *Cli) RunTerminal(shell string, stdout, stderr io.Writer) error {
    if c.client == nil {
        if err := c.connect(); err != nil {
            return err
        }
    }
    session, err := c.client.NewSession()
    if err != nil {
        return err
    }
    defer session.Close()

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

    session.Stdout = stdout
    session.Stderr = 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 {
        return err
    }

    session.Run(shell)
    return nil
}

測試RunTerminal方法

    cli := New("IP", "用戶名", "密碼", 端口號)

    cli.RunTerminal("top", os.Stdout, os.Stdin)

Go執行遠程ssh命令