python模块paramiko的上传下载和远程执行命令方法

    用python实现远程登陆主机执行命令或通过sftp上传下载文件，有个很好的模块paramiko模块来演示这些功能，使用起来很方便，大家可学习一下。写了几个小程序，用于说明此模块的使用方法。

1：连接远程linux主机并执行命令

#!/usr/bin/env python
import paramiko
hostname='192.168.0.102'
username='root'
password='abc'
port=22
paramiko.util.log_to_file('paramiko.log')
s=paramiko.SSHClient()
s.set_missing_host_key_policy(paramiko.AutoAddPolicy())
s.connect(hostname = hostname,port=port,username=username, password=password)
stdin,stdout,stderr=s.exec_command('free;df -h')
print stdout.read()
s.close()

执行结果如下：

             total       used       free     shared    buffers     cached
Mem:       2074940    2057420      17520          0      42416    1867968
-/+ buffers/cache:     147036    1927904
Swap:      2096472        240    2096232
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1              30G   12G   17G  42% /
none                 1014M     0 1014M   0% /dev/shm
/dev/sda3             2.0G  289M  1.6G  16% /var
/dev/sdb1             135G   14G  115G  11% /data
/dev/sdc1             135G  127G  880M 100% /data1
/dev/sdd1             135G   99G   30G  78% /data2

2：连接远程linux主机上传下载文件（paramiko模块是用SFTP协议来实现的）

#!/usr/bin/env python
import paramiko,datetime,os
hostname='192.168.0.102'
username='root'
password='abc123'
port=22
local_dir='/tmp/'
remote_dir='/tmp/test/'
try:
    t=paramiko.Transport((hostname,port))
    t.connect(username=username,password=password)
    sftp=paramiko.SFTPClient.from_transport(t)
    #files=sftp.listdir(dir_path)
    files=sftp.listdir(remote_dir)
    for f in files:
        print ''
        print '#########################################'
        print 'Beginning to download file  from %s  %s ' % (hostname,datetime.datetime.now())
        print 'Downloading file:',os.path.join(remote_dir,f)
        sftp.get(os.path.join(remote_dir,f),os.path.join(local_dir,f))#下载
        #sftp.put(os.path.join(local_dir,f),os.path.join(remote_dir,f))#上传
        print 'Download file success %s ' % datetime.datetime.now()
        print ''
        print '##########################################'
    t.close()
except Exception:
       print "connect error!"

执行结果：

#########################################
Beginning to download file  from 192.168.0.102  2012-11-05 15:49:01.334686
Downloading file: /tmp/test/wgetrc Download file success 2012-11-05 15:49:05.955184
##########################################

#########################################
Beginning to download file  from 192.168.0.102  2012-11-05 15:49:05.955342
Downloading file: /tmp/test/xinetd.conf Download file success 2012-11-05 15:49:10.929568
##########################################

#########################################
Beginning to download file  from 192.168.0.102  2012-11-05 15:49:10.929740
Downloading file: /tmp/test/warnquota.conf Download file success 2011-12-05 15:49:14.213570
##########################################

 还有好多用法，具体的可以看官方文档：http://www.lag.net/paramiko/docs/