"Python module" Paramiko module and host SSH connection

Remember the socket and socketserver you did in the previous section? Wrote a lot to achieve a small function, but today's paramiko really let people have a kind of earth gun to change the feeling of cannon!

Paramiko is a module written in the Python language that follows the SSH2 protocol and supports the connection of remote servers in a way that is encrypted and authenticated. Paramiko supports Linux, Solaris, BSD, MacOS X, Windows and other platforms to connect to another platform via SSH from one platform. With this module, it is convenient to make an SSH connection and SFTP protocol for SFTP file transfer.

This article only demonstrates the Paramiko connection to the Linux operating system.

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There's a total of Paramiko in the bag. Connection method (two classes): Sshclient and transport, each connection method supports password Authentication and certificate authentication .

Paramiko also has some other methods and properties. This article only describes the simple, common.

Paramiko is not a Python basic module, it needs to be based on the Pycrypto module, so you need to install Pycrypto, and then install Paramiko

PIP3 Install Pycrypto # Windows is likely to get an error due to the need to install C + + and set variables. PIP3 Install Paramiko # actually installs the Paramiko directly, automatically installs the dependent package. The PIP version I used was Pip 9.0.3# successful when prompted to install the following packages: Pycparser, Cffi, Pynacl, Bcrypt, PYASN1, Asn1crypto, cryptography, Paramiko

Sshclient: Used to execute commands remotely.

Method/Property Name	Parameters:	Description
connect ()	Implementing SSH encrypted connection Hostname port  username  password  pkey  timeout  allow_agent  Look_for _keys  compress	Parameter type: function Str: Host ip       # must parameter Int: Port          # must parameter Str: User name      # username and Pkey key connection must exist with a str: password Pkey: Key float: timeout       # optional Boool: When flase, disable connect to SSH proxy       # optional When Bool:flase is disabled, turn on compression when searching for key files       # optional Bool:true in ~/.ssh.       # Optional
Exec_command ()	Remote Execute command, Popen remote version ... "Command" BufSize	Parameter type: function STR: Commands that are executed remotely and need to be split by semicolons if more than one command needs to be manipulated int: Buffer size, Default-1, Unlimited
Load_system_host_keys ()	Load local public key checksum file, default is ~/.ssh/known_hosts FileName	Parameter type: function STR: remote host public key record file, Linux system default path ~/.ssh/known_hosts
Set_missing_host_key_policy ()	The connection host does not have the local host secret key or the Hostkeys object when the policy, currently supports three kinds: autoaddpolicy,rejectpolicy,warningpolicy	Autoaddpolicy: Automatically add host name and master key Rejectpolicy (default): Automatic rejection of unknown hostname and secret key Warningpolicy: Python warning for recording an unknown host key
		Example: SSH = Paramiko. Sshclient () Ssh.set_missing_host_key_policy (Paramiko. Autoaddpolicy ()) Ssh.connect (...) in the .......)
Stdin.wirte (str)	Str	Enter the character of the STR type to confirm the continuation. Should be similar to pause in bat

Example one: Sshclient connection with user name and password

Import paramikoparamiko.util.log_to_file ('/tmp/ssh_log ')  #  record connection information #  Connect remote def  using username password Myssh ():     cmd = input ("command to execute->>:"). Strip ()      Return cmd    ssh = paramiko. Sshclient () Ssh.set_missing_host_key_policy (Paramiko. Autoaddpolicy ())     #  before connect, set the parameters, automatically add the host to the Linux  host_knows file Ssh.connect ( hostname =  ' 192.168.1.100 ', port = 9999, username =  ' David ', password  =  ' wonianqing ') #也可以传形参: Ssh.connect (' 192.168.1.100 ', 9999,  ' David ', ' wonianqing ') cmd =  myssh () stdin,stdout,stderr = ssh.exec_command (cmd) if stdout.read ():     print  (Stdout.read ())             #  stdout and stderr can only have one with data, stdout normal return, stderr return error. else:    print  (Stderr.read ()) Ssh.close ()

Example two: Use certificate authentication for sshclient connections.

Import paramikossh = Paramiko. Sshclient () ssh.connect ("localhost", 9999,pkey= "") # need to create a key under Linux, Pkey is the private key address on the client, the server address default

Second, sftpclient: used to upload files to download the remote host

Method/Property Name	Role	Parameters	Example
Transport (host name, port number)	Establishing a remote host plus password pipeline object	Host Name: IP or hostname, str type Port number: Specify ports, type int	SF = Paramiko. Transport (("192.168.1.1", 22))
Connect (Username,password)	Establish a remote connection	Username: User Name Password: password	Sf.connect (username = "root", password= "Areyouok1")
Sftpclient.from_transport (encrypted pipeline)	Set up a client object to operate the remote file via SSH transport	Encrypted pipelines: SF objects previously created	SFTP = Paramiko. Sftpclient.from_transport (SF)
Get (remote file, local file)	Download the specified file from remote to local	Remote file name Local file name	Sftp.get (Remotepath,localpath)
Put (local file, remote file)	Upload a specified file to a remote path from local	Local file name Remote file name	Sftp.put (Localpath,remotepath)
Listdir (remote path)	List folders for a remote specified path	Remote path name	Sftp.listdir ("..")

Import Paramiko "" "Sftpclient" "" Sftp_transport_obj = Paramiko. Transport (("192.168.1.106")) Sftp_transport_obj.connect (username= "root", password= "a2266351z") sftp = Paramiko. Sftpclient.from_transport (sftp_transport_obj) # sftp.get () # sftp.put () Ss=sftp.listdir ("...") Print (ss) print (Ss.read ()) ' Paramiko can also use the socket object to connect ' ' Import socket,paramikoaddr = ' 192.168.1.106 ' port = 22socket_ obj = Socket.socket () socket_obj.connect ((addr,port)) Sftp_transport_obj = Paramiko. Transport (socket_obj) sftp_obj = Paramiko. Sftpclient.from_transport (sftp_transport_obj) Cmd_result = Sftp_obj.listdir (' ... ') Print (Cmd_result) sftp_transport_obj.close ()

Resources:

http://python.jobbole.com/87088/

"Python module" Paramiko module and host SSH connection