python学习：paramiko登录ssh

#!/usr/bin/env python
#coding:utf-8

import  paramiko


ssh=paramiko.SSHClient()

ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

private_key=paramiko.RSAKey.from_private_key_file('id_rsa')

ssh.connect(hostname='20.55.85.15',port=22,username='root',pkey=private_key)


stdin,stdout,stderr=ssh.exec_command('df;ip addr')


print(stdout.read().decode('utf-8'))



ssh.close()