Detailed analysis of route tracking command traceroute (1)
The premise for implementing all commands in this article is that you can access the Internet now.
People with a little computer knowledge know the ping command, which is used to check
The premise of all the commands in this article is: You can surf the internet now.People with a little computer knowledge know that the ping command is used to check whether their host is connected to the destination address, the communication
1.IMCP Protocol IntroductionAs mentioned earlier, the IP protocol is not a reliable protocol, it does not guarantee that the data will be delivered, then, naturally, the work of ensuring that the data is delivered should be done by other modules.
Icmp:internet Control Message Protocol ICMP is a sub-protocol of the TCP/IP protocol family that is used to pass control messages between IP hosts and routers. The control message refers to the message that the network is not accessible, whether
Work on it, whether in development or operations, when testing some system service ports, there are always TCP or UDP two protocols. As is known to all, TCP service ports can be remotely tested via Telnet, while UDP ports, in general, use Nmap,
New Linux literacy and linux literacyI. Linux features
1. free/open-source;2. multithreading/multiple users are supported;3. Good security;4. superior memory and file management.
Linux requires at least 4 M --> embedded developmentIi. File
In UnixLinux, the most efficient technique is not to operate the graphic interface, but to operate on the command line, because the command line means automation. In bash, you can use Ctrl-R instead of the upper/lower cursor key to search for
It is simple and powerful to share shell usage and scripts that you may not know!
Before reading the following sections, we strongly recommend that you open a shell experiment, which is not a major commodity in Shell textbooks :)
! $! $ Is
Reprinted from: Coolshell ChenhaoThe shell is also called the command line interface, which is the interface between the user and the computer under the *nix operating system. The word shell refers to the program in the operating system that
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