无法使用paramiko连接到远程主机？

我想使用scp在两个Ubuntu服务器之间传输文件,我在两个系统之间测试了scp并且它工作得很好.所以我不想每次都需要获取文件时执行命令所以我想写一个自动的python脚本使用scp从其他主机下载文件.

在网上搜索时,我发现这个Paramiko模块,我在安装时遇到了麻烦,我已经使用模块对其进行了纠正cryptography.现在,下面的终端解释了真正的麻烦.

>>> from paramiko import SSHClient
>>> from scp import SCPClient
>>> ssh = SSHClient()
>>> ssh

>>> ssh.load_system_host_keys()
>>> ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) 
>>> ssh.connect('somename@192.168.100.100')
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/local/lib/python2.7/dist-packages/paramiko/client.py", line 296, in c                                                                                    onnect
    to_try = list(self._families_and_addresses(hostname, port))
  File "/usr/local/lib/python2.7/dist-packages/paramiko/client.py", line 200, in _                                                                                    families_and_addresses
    addrinfos = socket.getaddrinfo(hostname, port, socket.AF_UNSPEC, socket.SOCK_S                                                                                    TREAM)
socket.gaierror: [Errno -2] Name or service not known
>>> ssh.connect('192.168.100.100')
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/local/lib/python2.7/dist-packages/paramiko/client.py", line 361, in c                                                                                    onnect
    server_key)
  File "/usr/local/lib/python2.7/dist-packages/paramiko/client.py", line 672, in m                                                                                    issing_host_key
    raise SSHException('Server %r not found in known_hosts' % hostname)
paramiko.ssh_exception.SSHException: Server '192.168.100.100' not found in known_hos                                                                                    ts

我已经更改了ip和用户名以便安全使用,somename is replaced但我已经尝试过original username.所以我尝试了几次,但我仍然得到同样的错误.

有关此问题的任何建议吗？请帮助.

也许你错过了missing_host_key_policy

这个如何:

proxy = None
client = paramiko.SSHClient()
client.load_system_host_keys()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(host['hostname'], username=host['user'], sock=proxy)

更多例子:www.programcreek.com