#InvokeShell #ParamikoSSH #Exec_Commands

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Paramiko Tutorial Playlist:
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   • Paramiko Tutorial :Part1  How SSH Hos...  


This Video demonstrates the difference between paramiko exec_command and invoke shell methods for initiating ssh connection to the remote machine
How to use invoke shell method for executing command in Cisco devices
How to use for loop in python for executing multiple commands in same ssh session
How to use python function to execute commands in mltiple devices using same code
use ssh key or password based authentication

Script Sample
~~~~~~~~~~~~~~~~~~~~~

import paramiko
from getpass import getpass
import time

host = "csr1.test.lab"
username = 'admin1'
password = 'admin'
password = getpass("Enter password :")

cmd1 = ["show ip int brie",
"config t",
"int loopback0",
"ip address 1.1.1.1 255.255.255.0",
"no shut",
"int loopback1",
"ip address 5.5.5.5 255.255.255.0",
"no shut",
"do sh ip int brie",
"exit"]
cmd2 = ["show run int lo0",
"show run int lo1"]

session = paramiko.SSHClient()

session.set_missing_host_key_policy(paramiko.AutoAddPolicy())
session.load_host_keys('/home/evolve/.ssh/known_hosts')
session.set_missing_host_key_policy(paramiko.WarningPolicy())
session.load_system_host_keys()

key_pass = getpass("Enter Private Key Password:")
key_file = paramiko.RSAKey.from_private_key_file("/home/evolve/.ssh/id_rsa")
def cisco_exec(host, commands):
try:
print(f"\n{'#'*50}\nConnecting to the Device {host} \n{'#'*50}")
session.connect(hostname=host,
username=username,
password=password,
pkey=key_file,
)

DEVICE_ACCESS = session.invoke_shell()
for command in commands:
DEVICE_ACCESS.send(f'{command}\n')
time.sleep(.5)
output = DEVICE_ACCESS.recv(65000)
print (output.decode(), end='')
session.close()
except:
print("Unable to connect to the Device")

cisco_exec('192.168.0.25',cmd1)
cisco_exec('csr1.test.lab',cmd1)
cisco_exec('csr1.test.lab',cmd2)

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