python paramiko 验证和发送命令的几种方式

法1：使用 exec.command()，此方法不适合用 sudu su不输入密码的状况

#!/usr/bin/env python

import paramiko

hostname=‘172.16.88.117‘

username=‘liuqian‘

pk_path=‘/home/liuqian/.ssh/id_rsa‘

try:

    key=paramiko.RSAKey.from_private_key_file(pk_path)

except paramiko.PasswordRequiredException:

    password = getpass.getpass(‘RSA key password: ‘)

    key = paramiko.RSAKey.from_private_key_file(pk_path, password)   # 需要口令的私钥

ssh=paramiko.SSHClient()

ssh.load_system_host_keys()

ssh.connect(hostname=hostname, username=username, pkey=key)

stdin, stdout, stderr=ssh.exec_command(‘cd /var/log;ls‘)

# 下面的方法适合使用密码登陆的状况

# ssh.connect(hostname=hostname, username=username, password=‘123456’)

# stdin, stdout, stderr=ssh.exec_command(‘sudo su‘)

# stdin.write(‘123456‘)

# stdin.flush()

print stdout.readlines()

print stderr.readlines()

ssh.close()

法2：使用 send()

#!/usr/bin/env python

import paramiko

import time

import socket

ip=‘172.16.88.117‘

username=‘liuqian‘

pk_path=‘/home/liuqian/.ssh/id_rsa‘

cmds=[‘sudo su\n‘, ‘cd /var/log\n‘, ‘ls\n‘]

try:

    key=paramiko.RSAKey.from_private_key_file(pk_path)

except paramiko.PasswordRequiredException:

    password = getpass.getpass(‘RSA key password: ‘)

    key = paramiko.RSAKey.from_private_key_file(pk_path, password)

s=paramiko.SSHClient()

s.load_system_host_keys()

try:

    s.connect(hostname=ip,username=username,pkey=key,timeout=5)

except socket.timeout as e:

    sys.exit(1)

ssh=s.invoke_shell()

for cmd in cmds:

    time.sleep(1)

    ssh.send(cmd)

    out = ssh.recv(1024)

    print out 

ssh.close()

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