[paramiko] Executing multiple commands within a single connection

[james bardin]

On Wed, Oct 14, 2009 at 2:53 PM, Nathan Farrar <nathan.farrar at gmail.com> wrote:
> I'm using paramiko to manage cisco devices remotely.  It works
> beautifully when I have a script open a connection to a device,
> execute a command, then close the connection.  However, if I connect
> and then attempt to execute a command, and then a second command, an
> error is thrown.  Here's a simple script that shows exactly what I'm
> talking about:
>
> #!/usr/bin/env python
>
> import paramiko
> import os
>
> def main():
>    paramiko.util.log_to_file("err.log")
>    client = paramiko.SSHClient()
>    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
>    client.connect("x.x.x.x", 22, "username", "password")
>    (stdin, stdout, stderr) = client.exec_command('show version')
>    (stdin, stdout, stderr) = client.exec_command('show version')
>    data = stdout.read()
>    print data
>    client.close()
>
> if __name__ == '__main__':
>    main()
>
> If I comment out the second client.exec_command() line, there are no
> problems.  Any tips to get this to work correctly?


Is the error about the connection being closed? I vaguely remember
something about cisco's ssh server always closing the connection after
one command (be it a login, or a single command).

-jim