I have to know the computer command to share the

computer command prompt is very important for people who often need to operate the computer, but for computer novices, novices do not know the computer command, do not know how to open the computer command prompt, So Xiaobian shared today, the computer commands that I had to know in using the computer.

1. nbtstat

This command uses the deNetBIOS display protocol statistics on TCP/IP and the current TCP/IP connection. With this command, you can get the remote host deNETBIOS information, such as the user name and belongs to Workgroup, network card deMAC address, etc. Here we need to understand a few basic parameters.

-a Use this parameter, as long as you know the remote host machine name, you can get its deNETBIOS information (the same below).

-A This parameter can also get the remote host deNETBIOS information, but you need to know it deIP.

-n Lists local machine deNETBIOS information.

When you get the deIP or machine name of the other party, you can use the nbtstat command to get the information of the other party further, which increases the insurance factor of our invasion.

Second, ping

It is used to check whether the network is fluent or the network connection speed command. As a admin or hacker living on the network, the ping command is the first one to master the deDOS command. The principle that it uses is such that the de machine on the network has a unique deIP address, and we give the target IP address. Send a data packet, the other party will return a packet of the same size, according to the return de packet we can determine the existence of the target host, you can initially determine the target host operating system. Let's take a look at some of the commonly used operations. Let's take a look at the help. Type ping/? Enter in the DOS window. De help screen shown. Here, we only have some basic de useful parameters (the same below).

-t means that the packet will be sent to the target IP without interruption until we force it to stop. Imagine if you use 100Mde broadband access, and the target IP is 56Kde kitten, then it will not be long before the target IP is dropped because it can't bear so much data. Oh, an attack is so simple.

-l defines the size of the send packet, the default is 32 bytes, we can use it to define up to 65500 bytes. Combined with the de-t parameters described above, there will be better results.

-n defines the number of times a packet is sent to the destination IP. The default is 3 times. If the network speed is slow, 3 times is a waste of time for us, because now we are only determining whether the target IP exists, then it is defined as one.

Explain that if the -t parameter is used with the -n parameter, the ping command is placed after the de parameter, such as "pingIP-t-n3", although the -t parameter is used, It is not always pinging, but only pinging 3 times. In addition, the ping command does not have to pingIP, you can also directly ping the host domain name, so you can get the host deIP.

Let's take an example to illustrate the specific usage.

Here, time=2 means that the time taken from the time the packet is sent to the time the packet is received is 2 seconds. From here, the network connection speed can be judged. The return value from TTLde can be used to preliminarily determine the operating system of the ping host. The reason why the "predictive judgment" is because this value can be modified. Here TTL=32 means the operating system may be win98.

(Small knowledge: If TTL=128, the target host may be Win2000; if TTL=250, the target host may be Unix)

As for using the ping command, you can quickly find the LAN fault. You can quickly search for the fastest deQQ server, you can ping other people … … these are played by everyone. These are the computer commands we often encounter. To use the computer better, we have to know these commands.