Programmer Think

prefaceThe laboratory has recently assigned a task to set up an information sharing system on the laboratory server to facilitate the information introduction of senior students after graduation, but the following requirements are met:Use as convenient as possibleAs the system is oriented to the research room, privacy needs to be guaranteedFor ...

1, The process by which the Linux kernel creates a new process 1. Relevant knowledge The three functions of the operating system kernel are process management, memory management and file system. The core is process managementThe state of linux process is different from the description of operating system principle. For example, the ready stat ...

Common modules of SaltStack 1. SaltSack module introduction: Module is one of the components that SaltStack contacts most in daily use. It is used to manage object operations. It is also the entrance for SaltStack to manage by pushing. For example, our daily simple tasks such as executing commands, viewing package installation and service ...

Set up note files (typera + picgo + gitee) in ubuntu system (whole process record) System configuration: Ubuntu 18.04 1. Install typora typora official website Typora common shortcut keys (translation) Execute the following commands from the command line: # or run: # sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA300B77 ...

Raw socket raw socket In recent years, the main idea of scanning the surviving host is to simulate the ICMP message through socket, and then discover a new world of socket -- raw socket. raw socket, that is, the original socket, can receive data frames or packets on the local network card. It is very useful for monitoring network traffic a ...

0. Background   first explain the environment: OpenJDK8 CentOS7    secondly, it is common to send messages through UDP broadcasting. When deploying in Linux environment today, the following exceptions occurred when sending messages: java.net.SocketException: insufficient privilege at sun.nio.ch.DatagramChannelImpl.se ...

This article is an original article of Joshua 317. Please note: reprinted from Joshua 317 blog https://www.joshua317.com/article/184 1, Introduction The ps command in Linux system is used to display the process status of the current system and list the currently running processes in the system. ps command is the most basic and powerful process ...

1. Preface As we all know, in Linux, everything is a file, such as configuration file, log file, startup file and so on. If we edit and query these files, we may think of some commands such as VI, VIM, cat and more. But these commands are not efficient. It's like a space to build a house. 10 masters were asked to dig the foundation with a sh ...

Installation steps of openEuler operating system and graphical interface 1, Write in front To tell you the truth, I haven't even heard of OpenEuler before. Here's the installation process through mountains and mountains and twists and turns. I thought it should be easy to install virtual machines like Ubuntu, but it turned out to be diffe ...

1. Docker image pull Jenkins environment command docker pull jenkins/jenkins:lts View the drop-down image docker images 2. Building Jenkins containers through container orchestration Create corresponding directory # Create corresponding directory mkdir -p /data/jenkins/jenkins_home/ chown -R 1000:1000 /data/jenkins/jenkins_home/ + data - do ...