Using paramiko when a unix server is using VShell

Question

Use case

On a unix server , when login manually ,opens a command shell of its own to run the command.

I am trying to automate this by using paramiko , however , somehow i am not able to execute the command on command shell using paramiko

What i have done ?

I created a simple script which is able to make connection, but its not executing command on Vshell as the ouput is always coming empty.

import paramiko
import sys

ssh_client=paramiko.SSHClient()
ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh_client.connect(hostname=sys.argv[1],port=sys.argv[2],username=sys.argv[3],password=sys.argv[4])
command="show hwid"
stdin,stdout,stderr=ssh_client.exec_command(command)
out=stdout.read()
print out
err=stderr.read()
print err
ssh_client.close()

The same script runs perfectly fine , when its used on server where vshell is not being used

Anyhelp or suggestion on this?

Score_Under · Accepted Answer · 2019-01-31 10:12:36Z

1

stdin,stdout,stderr=ssh_client.exec_command(command)

Regarding this line of code, I suspect that the SSH server is not properly configured to allow commands to be executed in this way (this is the equivalent of ssh myserver show hwid, rather than typing it into the terminal after login).

You might want to imitate the behaviour of typing the command in after logging into the server, and for that I think this is appropriate:

shell = ssh_client.invoke_shell()
stdin, stdout, stderr = shell.exec_command(command)

answered Jan 31, 2019 at 10:12

Score_Under

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2 Comments

pankaj mishra Over a year ago

its raising exeception paramiko.ssh_exception.SSHExceptionn: Channel closed

pankaj mishra Over a year ago

Although this did not exactly solved my problem, but i used invoke_shell method as suggested by you to solve my problem, i will update my answer

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