Go (golang.org/x/crypto/ssh)

package main

import (
	"fmt"
	"golang.org/x/crypto/ssh"
)

func main() {
	username := "user"
	password := "pass"
	server := "server:22"
	config := &ssh.ClientConfig{
		User: username,
		Auth: []ssh.AuthMethod{
			ssh.Password(password),
		},
		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
	}

	client, _ := ssh.Dial("tcp", server, config)
	defer client.Close()

	runCommand := func(cmd string) {
		session, _ := client.NewSession()
		defer session.Close()
		output, _ := session.Output(cmd)
		fmt.Printf("Output: %s", output)
	}

	runCommand(`date +"%T.%N"`)
	runCommand(`date +"%T.%N"`)
}