How to Use Paramiko and Python to SSH into a Server

In this article, I will show you how to use Paramiko and Python to SSH into a server. Paramiko is a Python library that provides a simple interface to SSH. It allows you to programmatically execute commands on a remote server over an encrypted connection.

Install Paramiko

Before we can use Paramiko, we need to install it. You can install Paramiko using pip:

pip install paramiko

SSH into a Server

To SSH into a server using Paramiko, you need to create an SSH client and connect to the server. Here’s an example:

import paramiko

# Create an SSH client
client = paramiko.SSHClient()

# Automatically add the server's host key
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

# Connect to the server

client.connect('hostname', username='username', password='password')

# Execute a command on the server

stdin, stdout, stderr = client.exec_command('ls -l')

# Print the output of the command

print(stdout.read().decode())

# Close the connection

client.close()

In this example, we create an SSH client using paramiko.SSHClient(). We then connect to the server using client.connect(), passing in the hostname, username, and password. We execute a command on the server using client.exec_command(), passing in the command we want to execute. We then print the output of the command using stdout.read().decode(). Finally, we close the connection using client.close().

How to batch execute commands on multiple servers

import paramiko

def ssh_command(hostname, username, password, command):
    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    client.connect(hostname, username=username, password=password)
    stdin, stdout, stderr = client.exec_command(command)
    print(f"Output from {hostname}:")
    print(stdout.read().decode())
    client.close()

servers = [
    {
        'hostname': 'server1.example.com',
        'username': 'user1',
        'password': 'password1'
    },
    {
        'hostname': 'server2.example.com',
        'username': 'user2',
        'password': 'password2'
    }
]

command = 'ls -l'

for server in servers:
    ssh_command(server['hostname'], server['username'], server['password'], command)

In this example, we define a function ssh_command() that takes the hostname, username, password, and command as arguments. We create an SSH client, connect to the server, execute the command, and print the output. We then define a list of servers with their hostnames, usernames, and passwords. We loop through the list of servers and execute the command on each server.

Conclusion

In this article, I showed you how to use Paramiko and Python to SSH into a server. Paramiko is a powerful library that allows you to interact with remote servers over an encrypted connection. I hope you found this article helpful. If you have any questions or comments, please let me know!

Happy coding! 🚀
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