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#!/usr/bin/env python
'''This runs "ls -l" on a remote host using SSH.
At the prompts enter hostname, user, and password.
'''
import pexpect
import getpass
def ssh_command (user, host, password, command):
"""This runs a command on the remote host. This returns a
pexpect.spawn object. This handles the case when you try
to connect to a new host and ssh asks you if you want to
accept the public key fingerprint and continue connecting.
"""
ssh_newkey = 'Are you sure you want to continue connecting'
child = pexpect.spawn('ssh -l %s %s %s'%(user, host, command))
i = child.expect([pexpect.TIMEOUT, ssh_newkey, 'password: '])
if i == 0: # Timeout
print 'ERROR!'
print 'SSH could not login. Here is what SSH said:'
print child.before, child.after
return None
if i == 1: # SSH does not have the public key. Just accept it.
child.sendline ('yes')
child.expect ('password: ')
i = child.expect([pexpect.TIMEOUT, 'password: '])
if i == 0: # Timeout
print 'ERROR!'
print 'SSH could not login. Here is what SSH said:'
print child.before, child.after
return None
child.sendline(password)
return child
host = raw_input('Hostname: ')
user = raw_input('User: ')
password = getpass.getpass('Password: ')
child = ssh_command (user, host, password, '/bin/ls -l')
child.expect(pexpect.EOF)
print child.before
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