将pxssh用于SSH时python代码出错

Question

I am trying to connect SSH through python. I have tried to remove errors using different methods, still struggling to get rid of the errors. This is my code:

1) import pxssh
   import getpass
   def get_ssh():
    s= pxssh.pxssh()
    hostname = raw_input('IP: ')
    username = raw_input('username: ')
    password = getpass.getpass('password: ')
    s.login (IP, username, password)
    s.logout()
    return True

2)   s= pxssh.pxssh(timeout='time_out', maxread=20000)
     s.SSH_OPTS += " -o StrictHostKeyChecking=no"
     s.SSH_OPTS += " -o UserKnownHostsFile=/dev/null"
     s.login ('IP', 'username', 'password')

In Both way I am getting same errors. Also I need some information about how to pass private key and public key for authentication:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "mit_test.py", line 11, in get_ssh
    s.login (hostname, username, password)
  File "/usr/lib/python2.7/dist-packages/pxssh.py", line 196, in login
    i = self.expect(["(?i)are you sure you want to continue connecting", original_prompt,
    "(?i)(?:password)|(?:passphrase for key)", "(?i)permission denied", "(?i)terminal type", 
    TIMEOUT, "(?i)connection closed by remote host"], timeout=login_timeout)
  File "/usr/lib/python2.7/dist-packages/pexpect.py", line 1316, in expect
    return self.expect_list(compiled_pattern_list, timeout, searchwindowsize)
  File "/usr/lib/python2.7/dist-packages/pexpect.py", line 1330, in expect_list
    return self.expect_loop(searcher_re(pattern_list), timeout, searchwindowsize)
  File "/usr/lib/python2.7/dist-packages/pexpect.py", line 1401, in expect_loop
    raise EOF (str(e) + '\n' + str(self))
pexpect.EOF: End Of File (EOF) in read_nonblocking(). Exception style platform.
<pxssh.pxssh object at 0x2840ad0>
version: 2.4 ($Revision: 516 $)
command: /usr/bin/ssh
searcher: searcher_re:
    0: re.compile("(?i)are you sure you want to continue connecting")
    1: re.compile("[#$]")
    2: re.compile("(?i)(?:password)|(?:passphrase for key)")
    3: re.compile("(?i)permission denied")
    4: re.compile("(?i)terminal type")
    5: TIMEOUT
    6: re.compile("(?i)connection closed by remote host")

What exactly I have to do? I have searched some other comments but could't find any solution. Also, how can i set a path for private key in login argument? Can anyone help me? I have gone through different posts link [link] ( EOF when using pexpect and pxssh ) but couldn't get the solution. thank you for your time.

Answer 1

The host your program tries to connect to is new the host it's connecting from. First the host's key must be accepted before proceeding to authentication. On a terminal this requires typing 'yes'. You can turn off host key checking with SSH options.

s = pxssh.pxssh(options={
    "StrictHostKeyChecking": "no"})