python subprocess for multiple command in one process

Question

I am using subprocess to connect ssh session to remote host to execute multiple commands.

My current code:

 import subprocess
 import sys

 HOST="[email protected]"
 # Ports are handled in ~/.ssh/config since we use OpenSSH
 COMMAND1="network port show"
 ssh = subprocess.Popen(["ssh", "%s" % HOST, COMMAND1],
                   shell=False,
                   stdout=subprocess.PIPE,
                   stderr=subprocess.PIPE)
 result = ssh.stdout.readlines()
 if result == []:
     error = ssh.stderr.readlines()
     print >>sys.stderr, "ERROR: %s" % error
 else:
      resp=''.join(result)
      print(resp)
COMMAND2="network interface show"

 ssh = subprocess.Popen(["ssh", "%s" % HOST, COMMAND2],
                   shell=False,
                   stdout=subprocess.PIPE,
                   stderr=subprocess.PIPE)
 result = ssh.stdout.readlines()
 if result == []:
     error = ssh.stderr.readlines()
     print >>sys.stderr, "ERROR: %s" % error
 else:
     resp=''.join(result)
     print(resp)

In above case my code asking me to enter password twice.

But what i want make is the password should be ask one time and multiple commands has to be execute.

Please help

Possible duplicate of Python subprocess - run multiple shell commands over SSH — Serge Ballesta
– Serge Ballesta, Commented Apr 3, 2017 at 12:06
stackoverflow.com/a/66620427/3701072 here is my take on a running multiple commands. — Hades
– Hades, Commented Mar 14, 2021 at 2:09

Community · Accepted Answer · 2017-05-23 12:17:47Z

3

You are opening two connections in your code, so it's natural that you'll have to enter a password twice.

Instead, you can open one connection and pass multiple remote commands.

from __future__ import print_function,unicode_literals
import subprocess

sshProcess = subprocess.Popen(['ssh', 
                               <remote client>],
                               stdin=subprocess.PIPE, 
                               stdout = subprocess.PIPE,
                               universal_newlines=True,
                               bufsize=0)
sshProcess.stdin.write("ls .\n")
sshProcess.stdin.write("echo END\n")
sshProcess.stdin.write("uptime\n")
sshProcess.stdin.write("echo END\n")
sshProcess.stdin.close()

see here for more details

edited May 23, 2017 at 12:17

CommunityBot

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answered Apr 3, 2017 at 11:10

philshem

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