python中的paramiko模块可以实现远程登陆主机执行命令或通过sftp上传下载文件。
本文分享二个小程序，用于说明python paramiko模块的使用方法。
1，python paramiko模块 连接远程linux主机并执行命令.
例子：
代码示例:#!/usr/bin/env python
#edit: www.jbxue.com
#
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：
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，paramiko模块 连接远程linux主机并上传下载文件（paramiko模块是用SFTP协议来实现的）
代码示例:#!/usr/bin/env python
#edit: www.jbxue.com
#
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
#-------------------------------------------------
更多用法，请参考官方文档：http://www.lag.net/paramiko/docs/