Golang：ssh运行远程脚本：没有这样的文件或目录

I'm using ssh module to run shell scripts on remote machine:

// ssh-run.go
package main
import (
    "bytes"
    "flag"
    "fmt"
    "log"
    "time"

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

var (
    flagUser = flag.String("user", "", "")
    flagPwd = flag.String("pwd", "", "")
    flagHost = flag.String("host", "", "")
    flagCmd = flag.String("cmd", "", "")
)

func main() {
    flag.Parse()
    log.SetFlags(log.Lshortfile | log.LstdFlags)

    cfg := ssh.ClientConfig {
        User: *flagUser,
        Auth: []ssh.AuthMethod(ssh.Password(*flagPwd)),
    }

    // skip err checking for short code
    conn, _ := ssh.Dial("tcp", fmt.Sprintf("%s:22", *flagHost), &cfg)
    defer conn.Close()
    ss, _ := conn.NewSession()
    defer ss.Close()

    var out bytes.Buffer
    ss.Stdout = &out
    ss.Stderr = &out
    ss.Run(*flagCmd)
    fmt.Printf("err: %v, out: %v
", err, out.String())
}

sshd

go run ssh-run.go -cmd "/bin/bash /home/me/try_ping.sh" -host 172.17.0.2 -pwd 123456 -user me

I got the error:

err: Process exited with status 127, out: /bin/bash: /home/me/try_ping.sh: No such file or directory

But when the remote server is a Ubuntu server, the Ping script works well.

What is the difference between Centos and Ubuntu when facing remote script running? I need to run remote scripts under many UNIX-like OS, How to fix the gap between them?