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How to Use 'head' Command to Manage Files Effectively

In Linux, there are various commands available to display the contents of the text file. Some of the popular and most frequently used commands are cat, less, more, view, etc. However, all of these commands are more relevant when we want to display a

Setting Up A Headless Linux Server Using Debian

A vast majority of Linux users are familiar with a Linux desktop PC which provides a graphical environment with which you can interact with the system. However, unlike a Linux desktop, a headless server is an operating system that runs without a GUI

Run Shortcuts from the Command Line on Mac

The Mac features a command line interface for executing and interacting with the Shortcuts app. This functionality can be particularly beneficial to macOS users who utilize the Shortcuts app for scripting and automation tasks, especially those who fr

How to Make a MacOS Monterey Boot Installer Drive

Some Mac users utilize bootable USB drives to install or upgrade to macOS Monterey. If you're looking to create a bootable macOS Monterey installer drive, we’ll guide you through the steps.This method is typically intended for advanced users who want

How to Install Sublime Text 4 on Linux Systems

If you're not a fan of the terminal, you might find it inconvenient to use command-line text editors like Vi or Vim. When it comes to graphical text editing tools, Sublime Text is one of the most widely used cross-platform proprietary text and source

How to send encrypted emails on Mac

While the internet has made it easier for people to stay connected, it also poses a lot of new types of risks, such as identity theft or fraud. These days, hackers are becoming increasingly smart with how they steal you

The Best Gaming Laptops of 2025

You Can Get KDE's Dolphin File Manager on Windows, and It's Weird

Dolphin also includes the anticipated multi-tab and dual-pane views, enabling you to switch swiftly between various folders without dealing with a clutter of overlapping windows. The File Manager on Windows 11 finally introduced tabs in 2022, but if

Building Your First Gaming PC in 2025: What You Actually Need

In the past, I always viewed the i5 lineup as anemic when it came to gaming. However, in 2025, a mid-range CPU is more than enough to start your gaming journey. Many games still don’t fully utilize multi-core performance as well as they could, so

How to view and set environment variables in Linux?

To view environment variables, printenv or echo can be used, export can be used for temporary settings, and configuration files need to be modified for permanent settings. The specific steps are: 1. Use printenv or echo$ variable name to view the current variable value; 2. Use exportVAR="value" to temporarily set the variable; 3. Write the export command to ~/.bashrc, ~/.bash_profile or /etc/environment to achieve permanent settings; 4. Make the changes take effect through the source file. Common variables such as PATH, HOME, LANG, etc. are used to control command paths, user directories and language settings.

What is service discovery in a microservices architecture?

Servicediscoverysolvestheproblemofdynamicallylocatingservicesinamicroservicesarchitecturewhereserviceaddressesfrequentlychange.Itenablesautomaticregistrationandlookupofservicesthroughacentralregistry,ensuringreliablecommunicationevenasservicesscaleor

How to get the system's hardware information?

Windows systems can quickly view hardware information through task manager, device manager and system information tools; 2. Linux systems can use command line tools such as lscpu, free, df, and lspci to obtain detailed hardware data; 3. Third-party tools such as CPU-Z, Speccy and BelarcAdvisor to provide more intuitive visual hardware reports. Selecting the appropriate method according to the operating system can easily obtain information about key components such as CPU, memory, hard disk, motherboard, etc., and some information needs administrator permission to be read accurately.

How does Ansible connect to managed nodes?

Ansible communicates with managed nodes via SSH without the need for installing agents or additional software. 1. SSH connection is used by default. SSH key authentication is recommended. You can also use the password to add the --ask-pass parameter. 2. SSH behavior can be controlled through inventory files or ansible.cfg, such as specifying a user or private key. 3. Support multiplexed SSH connections to improve performance. 4. Inventory, host IP, user, key and other information can be defined. 5. In addition to SSH, it also supports Local, Docker, WinRM and other connection methods, which can be specified through the ansible_connection variable. 6. It is necessary to ensure that DNS resolution, firewall opens 22 ports and correct settings

How to redirect standard output and standard error to a file?

The method to redirect stdout and stderr to files in Linux or macOS is to use command>output.log2>&1. The key points include: 1.>Redirect stdout to file; 2.2>&1Let stderr point to the location of stdout; 3. The order must be stdout first and then stderr; if only error information is recorded, please use command2>error.log; if you want to write different files separately, please use command>output.log2>error.log; if you need to add content instead of overwriting, use >&