Python Learning Note-Paramiko module

Python provides a Paramiko module that allows us to operate on remote systems via SSH, uploading and downloading files. His use is straightforward, see the example below.

Example 1

#!/usr/bin/env python# -*- coding:utf-8 -*-# author yuan liimport  paramiko#  Create the SSH object Ssh = paramiko. Sshclient () #  allows connections to host Ssh.set_missing_host_key_policy (Paramiko) that are not in the Know_hosts file. Autoaddpolicy ()) #  connection Server ssh.connect (hostname= ' host ',  port=22, username= ' root ',  password= ' 123 ') #  Execute command stdin, stdout, stderr = ssh.exec_command (' df -ht ') #  get command results result  = stdout.read () print (Result.decode ()) #  close Connection ssh.close ()----------"C:\program files\python3 \python.exe " C:/Users/yli/pycharmprojects/Exercise/Week12/paramiko_test.pyFilesystem               type      size   Used Avail Use% Mounted on/dev/mapper/centos-root xfs         28G  6.5G   22G  24% /devtmpfs                 devtmpfs  988m      0  988M   0% /devtmpfs                    tmpfs      998M   80K  998M   1% /dev/shmtmpfs                    tmpfs      998M  112M  887M  12% /runtmpfs                    tmpfs      998m     0  998m   0% / sys/fs/cgroup/dev/sda1                xfs       497m  169m  329m  34% /boottmpfs                    tmpfs      200M   12K  200M   1% /run/user/42tmpfs                     tmpfs     200m     0  200m   0%  /run/user/0

If we look at the source of the Ssh.connect () method, we can see that he actually invokes the method of the transport class. So we can use transport directly to create a session and then connect it, and the effect is the same as above.

Example 2

import paramiko# Create a Transport sessiontransport = paramiko. Transport (' Sydnagios ',  22) #连接sessiontransport. Connect (username= ' root ',  password= ' Goat2015 ') SSH  = paramiko. Sshclient () ssh._transport = transport# execute command stdin, stdout, stderr = ssh.exec_ Command (' DF ') print  (Stdout.read (). Decode ()) #创建sftp的对象sftp =paramiko. Sftpclient.from_transport (transport) #上传sftp. Put (' c:\\temp\\aaa.txt ', '/tmp/aaa.txt ') #下载sftp. Get ('/tmp/aaa.txt '), ' C:\\temp\\bbb.txt ') transport.close ()----------"C:\program files\python3\python.exe"  c:/users/yli/ pycharmprojects/exercise/week12/paramiko_test.pyfilesystem               type      size  used avail  Use% Mounted on/dev/mapper/centos-root xfs         28g  6.5g   22g  24% /devtmpfs                devtmpfs   988M     0  988M   0% /devtmpfs                    tmpfs      998M   80K  998M   1% /dev/shmtmpfs                     tmpfs     998m  112m  887m  12% /runtmpfs                     tmpfs     998m     0  998m   0%  /sys/fs/cgroup/dev/sda1                xfs       497m  169m  329m  34% /boottmpfs                    tmpfs      200m   12k  200m   1% /run/user/42tmpfs                     tmpfs     200M     0  200M    0% /run/user/0

Example 3, we can refine the example 2, the operation is encapsulated into a custom class

Import paramikoimport uuidclass sshconnection (object):     #初始化封装字段      def __init__ (self, host= ' Sydnagios ',  port=22, username= ' root ', pwd= ' 123 ') :        self.host = host         self.port = port        self.username  = username        self.pwd = pwd         self.__k = None     #连接session, perform operation, disconnect session     def run (self):         self.connect ()         pass        self.close ()      #连接     def connect (self):         transport =&nbSp;paramiko. Transport ((Self.host,self.port))         transport.connect (username= SELF.USERNAME,PASSWORD=SELF.PWD)         self.__transport =  transport     #断开     def close (self):         self.__transport.close ()               #执行命令         def cmd (self, command):         ssh = paramiko. Sshclient ()         ssh._transport = self.__transport         #  Execute Command         stdin,  stdout, stderr = ssh.exec_command (command)          #  Get command Results         rEsult = stdout.read ()         return result     def upload (Self,local_path, target_path):         #  Connect, upload         sftp = paramiko. Sftpclient.from_transport (Self.__transport)         #  will location.py   Upload to server  /tmp/test.py        sftp.put (local_path, target _path) ssh = sshconnection () Ssh.connect () r1 = ssh.cmd (' DF ') print (R1.decode ()) Ssh.upload (' C : \\temp\\aaa.txt ',  "/home/yli/s7.py") ssh.close ()----------"C:\program files\python3\python.exe"  c:/s13 Class Code/S13DAY13 Class code/s13day13_ Class Code/paramiko module _demo.pyfilesystem               1k-blocks    used available use%  mounted on/dev/mapper/centos-root  28813572 6760732  22052840  24% /devtmpfs                   1011616        0   1011616   0% /devtmpfs                      1021272       80   1021192   1% /dev/shmtmpfs                       1021272  113928    907344  12% /runtmpfs                       1021272       0   1021272   0% / sys/fs/cgroup/dev/sda1                   508588  172604    335984  34% /boottmpfs                        204256      12    204244   1% /run/user/ 42tmpfs                       204256       0    204256    0% /run/user/0

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Python Learning Note-Paramiko module