How to use the paramiko module for SSH client programming in Python 3.x

How to use the paramiko module for SSH client programming in Python 3.x

Overview:
SSH (Secure Shell) is a network protocol used to securely connect over insecure network connections Run a shell session. paramiko is a Python module that provides SSH client and server implementations. This article will introduce how to use the paramiko module for SSH client programming in Python 3.x to facilitate connection and operation with the remote server.

Step 1: Install the paramiko module
Before starting, you need to install the paramiko module. You can use the pip command to install:

pip install paramiko

Step 2: Import the paramiko module
First, you need to import the paramiko module to use it in Python code.

import paramiko

Step 3: Create an SSH client object
Next, you need to create an SSH client object. Create it using the SSHClient() method of the paramiko module.

client = paramiko.SSHClient()

Step 4: Set connection parameters
Before connecting, you need to set the connection parameters, including server address, port number, user name and password. The policy for server host key verification can be set using the set_missing_host_key_policy method of the client object. The AutoAddPolicy() policy is used here to automatically add a new host key.

client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

Step 5: Connect to the remote server
Use the connect method of the client object to connect to the remote server.

client.connect('服务器地址', port=端口号, username='用户名', password='密码')

Step 6: Execute remote command
After the connection is successful, you can use the exec_command method of the client object to execute the remote command. This method returns a triplet containing the standard input, standard output, and standard error of the execution result.

stdin, stdout, stderr = client.exec_command('要执行的远程命令')

Step 7: Process the execution results
You can use the read method of the standard output object to read the result of the command execution, and use the decode method to convert it into a string.

output = stdout.read().decode('utf-8')

Step 8: Close the SSH connection
After completing the operation, the SSH connection should be closed to release resources.

client.close()

Sample code:
The following is a simple sample code that demonstrates how to use the paramiko module for SSH client programming.

import paramiko

# 创建SSH客户端对象
client = paramiko.SSHClient()

# 设置连接参数
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

# 连接到远程服务器
client.connect('服务器地址', port=端口号, username='用户名', password='密码')

# 执行远程命令
stdin, stdout, stderr = client.exec_command('要执行的远程命令')

# 处理执行结果
output = stdout.read().decode('utf-8')
print(output)

# 关闭SSH连接
client.close()

Summary:
This article introduces how to use the paramiko module for SSH client programming. By creating an SSH client object, setting connection parameters, connecting to the remote server, executing remote commands, and closing the SSH connection, you can easily connect and operate the remote server. I hope this article will help you understand and use the paramiko module.

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