本脚本实现telnet连接到特定主机
首先通过telnet程序登录一次，记录下telnet过程中Server返回的提示信息，便于python脚本中做是否已呈现相应步骤的判断条件，如屏幕出现‘login:’应输入username，出现“Password:”时应输入password，出现“~]$”提示符则表明已成功登录。
以下是telnet过程完整log：
Kernel 3.10.0-514.2.2.el7.x86_64 on an x86_64
itop login: yanw
Password:
Last login: Tue Jun 13 15:42:14 from ::ffff:192.168.8.179
[yanw@itop ~]$ ls
test.file try.py
[yanw@itop ~]$
通过Python实现以上过程，需要调用telnetlib库，以下是面向过程的代码实现：
#-*- coding:utf-8 -*-
'''
Created on 2017年6月13日
Telnet to remote host
@author: will
'''
import telnetlib
Host = '192.168.8.82'
username = 'yanw'
password = 'will392891'
finish = '~]$' #login successfully
#telnet to host
tn = telnetlib.Telnet(Host)
print tn
#Enter username
print tn.read_until('login:', 5)
tn.write(username + '\n')
#Enter passwd
print tn.read_until('Password:', 5)
tn.write(password + '\n')
#Check if login successfuly
print tn.read_until(finish, 5)
print tn.write('ls' + '\n')
#close the connection
tn.close()
简单封装成Class:
#-*- coding:utf-8 -*-
'''
Created on 2017年6月13日
@author: will
'''
import telnetlib
from _pyio import __metaclass__
__metaclass__
class telnetOO():
'''
Telnet to remote host
'''
def connect(self, Host, Username, Password, SuccessCheck):
tn = telnetlib.Telnet(Host)
#print tn
tn.read_until('login:', 1)
print tn.read_until('login:', 1)
tn.write(Username + '\n')
tn.read_until('Password:', 1)
print tn.read_until('Password:', 1)
tn.write(Password + '\n')
#print tn.read_until(SuccessCheck, 5)
try:
tn.read_until('~]$', 1)
print 'Login success !'
except:
print 'Login failed , Please check the Username or Passwd !'
else:
pass
if __name__ == '__main__':
session = telnetOO()
print 'Telent to 192.168.82,with username:yanw & Passwd:will392891'
log = session.connect('192.168.8.82', 'yanww', 'will392891', '~]$')
执行结果：
Telent to 192.168.82,with username:yanw & Passwd:will392891
Login success !
