Python模塊paramiko的上傳下載和遠程執行命令方法

用python實現遠程登陸主機執行命令或通過sftp上傳下載文件，有個很好的模塊paramiko模塊來演示這些功能，使用起來很方便，大家可學習一下。寫了幾個小程序，用於說明此模塊的使用方法。

1：連接遠程linux主機並執行命令

1. #!/usr/bin/env python
2. import paramiko
3. hostname='192.168.0.102'
4. username='root'
5. password='abc'
6. port=22
7. paramiko.util.log_to_file('paramiko.log')
8. s=paramiko.SSHClient()
9. s.set_missing_host_key_policy(paramiko.AutoAddPolicy())
10. s.connect(hostname = hostname,port=port,username=username, password=password)
11. stdin,stdout,stderr=s.exec_command('free;df -h')
12. print stdout.read()
13. s.close()

執行結果如下：

1. total used free shared buffers cached
2. Mem: 20749402057420175200424161867968
3. -/+ buffers/cache: 1470361927904
4. Swap: 20964722402096232
5. Filesystem Size Used Avail Use% Mounted on
6. /dev/sda1 30G12G17G42% /
7. none 1014M01014M0% /dev/shm
8. /dev/sda3 2.0G289M1.6G16% /var
9. /dev/sdb1 135G14G115G11% /data
10. /dev/sdc1 135G127G880M100% /data1
11. /dev/sdd1 135G99G30G78% /data2

2：連接遠程linux主機上傳下載文件（paramiko模塊是用SFTP協議來實現的）

1. #!/usr/bin/env python
2. import paramiko,datetime,os
3. hostname='192.168.0.102'
4. username='root'
5. password='abc123'
6. port=22
7. local_dir='/tmp/'
8. remote_dir='/tmp/test/'
9. try:
10. t=paramiko.Transport((hostname,port))
11. t.connect(username=username,password=password)
12. sftp=paramiko.SFTPClient.from_transport(t)
13. #files=sftp.listdir(dir_path)
14. files=sftp.listdir(remote_dir)
15. for f in files:
16. print''
17. print'#########################################'
18. print'Beginning to download file from %s %s ' % (hostname,datetime.datetime.now())
19. print'Downloading file:',os.path.join(remote_dir,f)
20. sftp.get(os.path.join(remote_dir,f),os.path.join(local_dir,f))#下載
21. #sftp.put(os.path.join(local_dir,f),os.path.join(remote_dir,f))#上傳
22. print'Download file success %s ' % datetime.datetime.now()
23. print''
24. print'##########################################'
25. t.close()
26. except Exception:
27. print"connect error!"

執行結果：

1. #########################################
2. Beginning to download file from192.168.0.1022012-11-0515:49:01.334686
3. Downloading file: /tmp/test/wgetrc Download file success 2012-11-0515:49:05.955184
4. ##########################################
6. #########################################
7. Beginning to download file from192.168.0.1022012-11-0515:49:05.955342
8. Downloading file: /tmp/test/xinetd.conf Download file success 2012-11-0515:49:10.929568
9. ##########################################
11. #########################################
12. Beginning to download file from192.168.0.1022012-11-0515:49:10.929740
13. Downloading file: /tmp/test/warnquota.conf Download file success 2011-12-0515:49:14.213570
14. ##########################################