what is nslookup

I. Ask questions At present, we are increasingly not sure whether the Email address provided by the user on the Web page or on the phone is actually valid. In today's age of spam flooding, people have no reason to give up their Email addresses

Process#********* Creating a single process through process fromMultiprocessingImportProcessImportOS#code to be executed by the child processdefRun_proc (name):Print('Run Child process%s (%s) ...'% (name, Os.getpid ()))#gets the name of the current

First, the purpose of the experiment:Implement DNS server functionality to provide forward, reverse resolutionSecond, the experimental environmentWindows system with Linux installedVirtual machines with IP 192.168.6.3 　　　 Iii. purpose of the

As we all know, there may be various artificial network faults on the Internet in China, making it impossible for us to access many websites. However, because many people are not familiar with the network, they are often unable to distinguish

Appwiz. Cpl add or delete programs   Winver checks the Windows version Wmimgmt. msc open windows management architecture (Wmi) Wupdmgr Windows Update Program Wscript Windows Script Host settings Write Board Winmsd system information Wiaacmgr scanner

Add by Zhj: Learning, the original GFW available means so much ah, of course, I guess the real means should be more than this. And GFW are constantly escalating.Author Twitter: @davidsky2012 Posting to Moonlight blog post http://www.williamlong.info/

I. DNS basics [DNS System (server) Working Principle and attack protection methodology] DNS: Domain Name System, the Domain Name resolution server. Its role on the Internet is to convert the Domain Name into an IP address that can be recognized by

This article mainly introduces the use of multi-process in Python to achieve parallel processing of the method summary, with a certain reference value, interested in small partners can refer to Processes and threads are important concepts in the

This article mainly introduces the use of multi-process in Python to achieve parallel processing of the method summary, with a certain reference value, interested in small partners can refer to Processes and threads are important concepts in the

The production environment of Hadoop cluster installation and configuration + DNS + NFS environment LinuxISO: CentOS-6.0-i386-bin-DVD.iso32 bit JDKversion: 1.6.0 _ 25-eaforlinuxHad .. The production environment of Hadoop cluster installation and

Common windows running command gpedit. msc ----- Group Policy Sndrec32 ------- Recorder NSLookup ------- IP address Detector Explorer ------- open the Resource Manager Logoff --------- logout command Tsshutdn ------- 60 seconds countdown shutdown

What is a process and what is a thread?The process and the thread are the containing relationship, and the process contains the thread.A process is the smallest unit of system resource allocation, and a thread is the smallest unit of system task

Common CentOS network configurations and operations In Linux, the most common network configuration commands include ifconfig and route. ifconfig is used to view and configure network interface (usually Nic) information, including the IP address and

To get the Python program to implement multi-process (multiprocessing), we first understand the operating system knowledge.The Unix/linux operating system provides a fork() system call, which is very special. A normal function call, called once, is

1.wget Command Network applicationThe wget command is used to download files from the specified URL. Wget is very stable, it in the bandwidth is very narrow and unstable network has a strong adaptability, if it is because of network download failure,

#!/usr/bin/env Python3#-*-Coding:utf-8-*-‘‘‘From multiprocessing import ProcessImport OS#子进程要执行的代码def run_proc (name):Print (' Run child process%s (%s) ... '% (Name,os.getpid ()))If __name__== ' __main__ ':Print (' Parent process%s. '% Os.getpid

Virtual Machine A? ? 1. Set the firewall state to trusted? 2.SELinux currently modified to permissive? 3.SELinux permanent status modified to permissive? ? 4. Clear the Yum cache to check if Yum is available? ? Virtual Machine B? ? 1. Set the

I. Introduction to DNS ServicesDNS is the abbreviation for the computer domain Name System or domain name Service, which consists of a parser and a domain name server. A domain name server is a domain name and corresponding IP address that holds all

traceroute Command (Unix)/tracert command (Windows)The format of the TRACERT command is: tracert [-d] [-h maximum_hops] [-j host-list] [-w timeout] [-r] [-S srcaddr] [-4] [-6] target_name.①,-DIndicates that the address is not resolved to a host name.

This article lists the network and monitoring commands that every Linux user should know about. The network and monitoring commands are similar to the hostname, ping, ifconfig, iwconfig, netstat, nslookup, traceroute, finger, telnet, and ethtool