Why chdir command doesn't work with client.get_transport() ?

["Martin v. Löwis"]

> import paramiko
> def exec_command(trans, command):
>     chan = trans.open_session()
>     chan.exec_command(command)
>     stdin = chan.makefile('wb')
>     stdout = chan.makefile('rb')
>     stderr = chan.makefile_stderr('rb')
>     return stdin, stdout, stderr
> def main():
>     client = paramiko.SSHClient()
>     client.connect(hostname, username=username, password=password)
>     trans = client.get_transport()
>     dummy_chan = trans.open_session()
>     exec_command(trans, 'cd temp')
>     stdin, stdout, stderr = exec_command(pwd)
> 
>>From the last line I found from stdout that the pwd is not changed. I tried
> to type the full path in 'cd', did not help. Other UNIX commands such as ls,
> mkdir, cp, rm will work. Only this 'cd' never works. I got stuck here.
> 
> Please help. Thanks!

It works. However, each exec_command opens a new session. Within the
first session, you do the cd command, and in the second session, the
process in whose context the cd was executed has already terminated.
You get a new process, and that starts out with the default directory
again.

You need to open a remote shell, and send commands to its command
line; AFAICT, you can't use exec_command for that.

Regards,
Martin