python下paramiko模块ssh

#!/usr/bin/env python
import paramiko

hostname='172.28.102.249'
username='root'
passWord='toor'

if __name__=='__main__':
                                paramiko.util.log_to_file('paramiko.log')
                                s=paramiko.SSHClient()
                                s.load_system_host_keys()
                                s.connect(hostname=hostname,username=username,password=password)
                                stdin,stdout,stderr=s.exec_command('ifconfig;free;df')  #这里我输了了多个命令，可以试验下
                                print stdout.read()
                                s.close()