Using Paramiko to ssh into ftp servers in Python

Question

I'm using the code below to ssh into the ftp servers :

ssh = paramiko.SSHClient()
ssh.connect(server, username=username, password=password)
ssh_stdin, ssh_stdout, ssh_stderr = ssh.exec_command("locate my_file.txt")
print ssh_stdout

However, I'm using multiple servers so I replace the server argument a lot. On the main ftp server I'm trying to connect to, I get this error:

socket.error: [Errno 60] Operation timed out

Whenever I try to use other servers though, I usually get this error:

paramiko.ssh_exception.S SHException: 
Server 'ftp.server.org' not found in known_hosts

Does anyone know of any possible solutions to solve either one or both of these problems?

Answer 1

To fix your 2nd error, you can tell Paramiko to auto-add new servers:

 ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

Take a look at the docs .

Answer 2

For your second problem, you need to add the following line after ssh = paramiko.SSHClient() :

ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

This will allow paramiko to auto-accept unknown keys (and should allow you to SSH into those other servers)