在批量服务器密码统一的情况下使用：
参数介绍：
-u   用户名
-p 密码
-P port
-s  要执行的脚本
-c 要执行的命令
-f  要执行的服务器IP列表

指定-s的时候，直接执行脚本，跳过-c

#!/bin/env python
import paramiko
import sys,os
import time
from optparse import OptionParser
parser = OptionParser(add_help_option=0)
parser.add_option("-f", "--file", action="store", type="string", dest="listfile",default="")
parser.add_option("-u", "--user", action="store", type="string", dest="username",default="root")
parser.add_option("-p", "--passwd", action="store", type="string", dest="password",default="mypass")
parser.add_option("-P", "--port", action="store", type="string", dest="port",default="22")
parser.add_option("-c", "--cmd", action="store", type="string", dest="cmdline",default="hostname")
parser.add_option("-s", "--script", action="store", type="string", dest="script",default="")
(options, args) = parser.parse_args()
listfile=options.listfile
username = options.username
passwd = options.password
port = options.port
rcmd = options.cmdline
scriptfile = options.script
time_now = time.strftime('%Y%m%d%H%M%S')
infofile="log/info.txt"
if os.path.isdir("log"):
    pass
else:
    os.mkdir("log")
if os.path.isfile(infofile):
        os.rename(infofile,infofile+time_now)
info = open(infofile,"a")
def execmd(host,port,username,passwd,rcmd):
    #info = open(infofile,"a")
    try:
        client = paramiko.SSHClient()
        #client.load_system_host_keys()
        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        client.connect(host,port=int(port),username=username,password=passwd,timeout=1)
        #rcmd = "ifconfig eth0|grep HWaddr|awk '{print $NF}'"
        print rcmd
        stdin, stdout, stderr = client.exec_command(rcmd)
        #info.write(host+"\n"+"@"*20+"\n")
        for line in stdout:
            info.write("%s: %s"%(host,line))
        client.close()
    except:
        info.write("%s: SSH Login Faild\n\n"%(host))
    #info.close()
def transfile():
    try:
        trans = paramiko.Transport((host,int(port)))
        trans.connect(username=username,password=passwd)
        sftp = paramiko.SFTPClient.from_transport(trans)
        #sftp.get("","")
        sftp.put(scriptfile,"/tmp/%s"%scriptfile)
        trans.close()
    except:
        #print "File translation faild"
        info.write("%s: File translation faild\n"%(host))
if __name__=="__main__":
    for ipaddr in open(listfile).readlines():
        host = ipaddr.strip("\n").rstrip().lstrip()
        print host
        if scriptfile == "":
            pass
        else:
            transfile()
            rcmd="sh /tmp/%s"%scriptfile
        execmd(host,port,username,passwd,rcmd)
    info.close()