Last week, our automation pipeline suddenly failed, and the error message was simply: Connection refused The developer said: “The service is down, go check the server.” I logged into the test machine and resolved it with three commands: ps -ef | grep order-service # Check processesnetstat -tunlp | grep 8080 # Check porttail -f /var/log/order.log … Read more
1. cd cd: Change directory Change the working directory. The commands cd and ls are probably the two most used commands, especially for users unfamiliar with the Linux directory structure. cd / # Enter the root directory cd – # Return to the last directory cd # Return to the home directory cd ~ # … Read more
Click the blue text to follow us 1. Introduction The chown (change owner) command is used to modify the owner and group of a file. Linux/Unix is a multi-user, multitasking operating system, and all files have an owner. The chown command changes the owner of a specified file to a specified user or group. The … Read more
1. Network Management Commands 1. <span>ping</span>: Network Connectivity Test # Test basic connectivity (send 4 packets) ping -c 4 api.example.com # Continuous testing (test 10 times per second) ping -i 0.1 -c 10 api.example.com Application Scenario: Use <span>ping</span> to confirm network connectivity. If ping fails, it indicates a network issue; if it pings successfully but … Read more
This article provides a detailed introduction to the usage of the grep command, including common options, regular expression applications, and more. Let’s learn together and improve together! Continue reading!First, what is grep?grep is a command in the Linux system used to search for text within files, useful for various text processing and log analysis. I … Read more
In the world of Linux, the philosophy that “everything is a file” means that we deal with thousands of files every day. Faced with a vast ocean of files, how can we quickly and accurately locate the target files? This article systematically organizes various techniques for file searching in Linux, from basic commands to efficient … Read more
Click on "Programmer Interview", select "Star🔝" As operations and maintenance personnel, these commonly used commands are essential. Mastering these commands will significantly improve work efficiency. 1. File and Directory The cd command is used to switch the current directory. Its parameter is the path to the directory to switch to, which can be an absolute … Read more
5 Hidden Linux Commands to Double Your Daily Task Efficiency If you’ve spent some time in the Linux terminal, you may have fallen in love with commands like <span>ls</span>, <span>grep</span>, or <span>cat</span>. They are essential tools for daily life in Linux. However, Linux has many powerful commands that most people have never heard of. Some … Read more
Introduction In the previous article, we introduced the basic format of the Linux command line and the fundamental concepts of the Shell. Getting Started with Linux: Entering the World of Command Line In this article, we will delve deeper into the various categories of commonly used commands in Linux. These commands are the foundation of … Read more
A Brief Explanation of Several Confusing Points for Beginners <span>ip</span> Command: How to Use It? It is the modern replacement for <span>ifconfig</span>. Think of it as a network toolbox where you just need to specify the object (address, network interface, route, etc.) and the action to perform. <span>ip addr</span> (or <span>ip a</span>): Manage IP addresses. … Read more