本腳本實現telnet連接到特定主機
首先通過telnet程序登錄一次，記錄下telnet過程中Server返回的提示信息，便于python腳本中做是否已呈現相應步驟的判斷條件，如屏幕出現‘login:’應輸入username，出現“Password:”時應輸入password，出現“~]$”提示符則表明已成功登錄。
以下是telnet過程完整log：
Kernel 3.10.0-514.2.2.el7.x86_64 on an x86_64
itop login: yanw
Password:
Last login: Tue Jun 13 15:42:14 from ::ffff:192.168.8.179
[yanw@itop ~]$ ls
test.file? try.py
[yanw@itop ~]$
通過Python實現以上過程，需要調用telnetlib庫，以下是面向過程的代碼實現：
#-*- 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 = '~]$'? ? ? ? ? #login successfully
#telnet to host
tn = telnetlib.Telnet(Host)
print tn
#Enter username
print tn.read_until('login:', 5)
tn.write(username + '\n')
#Enter passwd
print tn.read_until('Password:', 5)
tn.write(password + '\n')
#Check if login successfuly
print tn.read_until(finish, 5)
print tn.write('ls' + '\n')
#close the connection
tn.close()
簡單封裝成Class:
#-*- coding:utf-8 -*-
'''
Created on 2017年6月13日
@author: will
'''
import telnetlib
from _pyio import __metaclass__
__metaclass__
class telnetOO():
'''
Telnet to remote host
'''
def connect(self, Host, Username, Password, SuccessCheck):
tn = telnetlib.Telnet(Host)
#print tn
tn.read_until('login:', 1)
print tn.read_until('login:', 1)
tn.write(Username + '\n')
tn.read_until('Password:', 1)
print tn.read_until('Password:', 1)
tn.write(Password + '\n')
#print tn.read_until(SuccessCheck, 5)
try:
tn.read_until('~]$', 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', '~]$')
執行結果：
Telent to 192.168.82,with username:yanw & Passwd:will392891
Login success !
