測試DNS是否成功設定 - python script

#!/usr/bin/python
import time
import sys
import os
i = 1

if len(sys.argv) < 3:
    sys.stderr.write('Usage: sys.argv[0] target-domain times-of-test  DNS-IP\n')
    sys.exit(1)
else:
    counter = int(sys.argv[2])
    domain = sys.argv[1]
    dnsip = sys.argv[3]
    while i <= counter:
        i += 1
        os.system("dig " +  domain "@" + dnsip + " | grep NXDOMAIN")

#只要看ouput出來有幾行 NXDOMAIN 就知道大約的錯誤機率了