Programmer Think

Recently, in the study of GPSD related information, it is found that GPSD can cooperate with NTPD to achieve high-precision time synchronization function, so this topic is involved. At present, Ublox F9P module is in hand, UART outputs NEMA data, and another GPIO outputs 1PPS pulse First, look at a ...

  what that? Zookeeper is frequently used in distributed development, but many frameworks encapsulate it. Beginners may not understand its working principle well. This article demonstrates the simple demo of using zookeeper to realize service registration and service discovery, hoping to achieve th ...

As one of springCloud's bucket components, zuul has an indispensable component.As a normal java API gateway, it has its own benefits: Avoid exposing internal information to the outside; Unified Service End Application Entry; Adding an additional security layer to the microservice; Support hybrid communication protocols; Reduce the complexity ...

ls command Function description: Lists a list of files (including subdirectories) in a specified directory, but does not display the contents of the files Usage: ls [OPTION]... [FILE]... option Effect -a Show all files, including hidden files -A Show all files except.And.. -l Show detailed properties of the file -h Converts the f ...

The previous articles describe a number of ways to hide processes, hide TCP connections, and hide kernel modules. To sum up, the differences from most articles on the Internet that introduce Rootkit are: Most articles on the web are hook procfs to hide objects. My approach is to remove objects directly from data structures such as chains. ...

Since our Web application is running in tomcat, the request must arrive at Tomcat first. Tomcat actually handles the request as follows. First, provide Socket service The start of Tomcat must be Socket service, but it only supports HTTP protocol! In fact, we can expand our thinking here. Since Tomcat is based on Socket, what about BIO or NIO ...

There are some serious bug s in the code written before to realize simple network communication. Write in detail later. According to the last code, mainly increased the user registration, login page, and realized the real-time display of the current login status of the number of people. And solve some bug s not found last time. (refer to previo ...

In general, when our client starts tcp to connect to the server, it's a connection thread, so it's easy to write code public class SocketTcpClient implements Runnable { private final String ip; private Socket socket; public SocketTcpClient(String ip) { this.context = context; this.ip = ip; } @Override ...

socket long connection Performance issues caused by client maintaining heartbeat Client code It realizes a thread that sends heartbeat packets to the server regularly, and a thread that receives messages returned from the server. package practice; import client.Client; import client.KeepAlive; import java.io ...

Please indicate the source of the reprint: http://blog.csdn.net/l1028386804/article/details/78845722 Imagine an environment where you can access an SSH server on your intranet and you also want to access a Web server on the same segment.You cannot access the Web server directly, but SSH servers can access the Web server and there are no tools ...