Use Python script to monitor specified domain name resolution

Python script:

                                                                                                                       21,0-1        all#!/usr/bin/python#  -*- coding: utf-8 -*-#此脚本用于检测域名解析是否正常import  osnamelist = {' www.51cto.com ': ' 218.11.0.91 ', ' www.51talk.com ': ' 60.205.82.82 '}mail = [' [email protected] ', ' [email  protected] ']def check_domain ():         "' uses Nslook domain name resolution and compares with dictionary ip, if parsing exception sends an email to the specified recipient ' '          for i in namelist:                 address = os.popen ("nslookup %s |  grep -v  ' #53 '  | awk -f ': '   '/^address/{print $2} ' " % i). read (). Strip ()                 if   (address == namelist[i]):                         pass                 else:                          for j in mail:                                 os.popen ("echo "% s domain name resolution exception, please confirm! ' | mail -s  '%s Domain name resolution exception '  %s '  % (i,i,j))                                    #os. Popen The i,i,j in parentheses after the percent semicolon is passed to the shell command with the specified python variable check_domain ()

Summary:

In the above Python script, some of the variables in Python need to be passed to the shell reference, and here are a few ways to learn the following

Example 1:

#!/usr/bin/python#-*-coding:utf-8-*-import osvar = ' Test ' os.environ[' var '] = str (var) #environ的键值必须是字符串os. system (' EC Ho $var ')

Example 2:

#!/usr/bin/python#-*-coding:utf-8-*-import osvar = ' test ' os.system ("echo%s"% Var)

Example 3:

#!/usr/bin/python#-*-coding:utf-8-*-import osvar = ' Test ' output = Os.popen ("echo%s"% var) print output.read (). strip ()

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Use Python script to monitor specified domain name resolution