cat para3.py
#!/usr/bin/env python

import paramiko , sys

usage  = 'digite hostname, usuario e senha'

if len(sys.argv) < 4:
	 print usage

#SSH Client
client = paramiko.SSHClient()
addpolicy = paramiko.AutoAddPolicy()
client.set_missing_host_key_policy(addpolicy)
client.connect(hostname=sys.argv[1], username=sys.argv[2], password=sys.argv[3])


#run a command
print '\nRun a command'
cmd = 'ls -la'
stdin, stdout, stderr = client.exec_command(cmd)
for i, line in enumerate(stdout):
	line = line.rstrip()
	print "%d: %s" % (i,line)
	if i >=20:
		break


client.close()

#data = stdout.read()
#if data.startswith('Linux'):
#	print data