python 操作 ssh

#coding:utf-8
"""
    ssh操作例子 实现了服务器日志下载
    2012-08-24
    yywolf
"""
import paramiko
import time
hostname="????"
port=22
username="app"
password="????"
if name=="main":
paramiko.util.log.log_to_file('paramiko.log')

s = paramiko.SSHClient()
s.load_system_host_keys()
s.set_missing_host_key_policy(paramiko.AutoAddPolicy())
s.connect(hostname,port,username,password,timeout=4)
stdin,stdout,stderr = s.exec_command("sh ~/log/check")
print stdout.read()
s.close()


#sftp
t = paramiko.Transport((hostname,port))
t.connect(username=username,password=password)
sftp = paramiko.SFTPClient.from_transport(t)
files = sftp.listdir("/home/app/log/")
for f in files:
    print f

filetime = time.strftime('%Y-%m-%d',time.localtime(time.time()))
#需要下载的文件 和下载后的文件名
sftp.get("/home/app/log/server.txt","C:\\Users\\Administrator\\Desktop\\server.txt")    
sftp.get("/home/app/log/"+filetime+".log.zip","C:\Users\Administrator\Desktop\\"+filetime+".log.zip")

#RASkey
pkey_file = "E:\\yy\\tools\\key\\rsa.txt"
key = paramiko.RSAKey.from_private_key_file(pkey_file)
s = paramiko.SSHClient()
s.load_system_host_keys()
s.set_missing_host_key_policy(paramiko.AutoAddPolicy())
s.connect(hostname,port,username,pkey=key)
stdin, stdout, stderr = s.exec_command("ls -l /home/app/log")
print stdout.read()
s.close()

raw_input()</pre>