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Mastering Essential Linux Commands: Your Path to File and Directory Mastery

Introduction

This documentation aims to offer a comprehensive understanding of essential commands and techniques for file and directory management in a Linux environment. Mastering these commands is crucial for efficient navigation, manipulation, and analysis of files and directories.

We'll embark on a journey by delving into the foundational usage of key commands like wc, du, grep, awk, and find, uncovering their individual functionalities. Additionally, we'll explore how these commands can be combined using powerful methods such as pipes (|), -exec {} \;, or -exec {} +, unlocking their synergistic potential.

Moreover, to solidify your understanding, real-life examples showcasing practical applications will be demonstrated.

Simple guide to using Docker on Windows 10 and access from WSL 2

Introduction

For a heavy linux user like me, using windows also mean find a door to work with a linux distro. There are several options to gauge from the situation. I usually need both docker and wsl2 on the computer. And i've installed this many times.

docker-logo

So, this is a very straight forward tutorial on docker and wsl2 installation and configuration on windows10 or 11.

Prerequisites

  • Windows 10 Pro, Enterprise, or Education edition.
  • WSL 2 enabled on your Windows machine.
  • Docker Desktop for Windows installed.

Step-by-Step Guide

  1. Install Docker Desktop for Windows:

  2. Enable WSL 2:

    Enable docker for wsl2

  3. Set wsl default version to 2:

    • Open PowerShell as an administrator and run the following command:
    wsl --set-default-version 2

Run an application forever on linux made easy: Case of a javascript project

Introduction

If you're looking to turn your application into a background process, you have come to the right tutorial, always using the fastest way.

Instead of just writing theory, we we use a real world example i've worked on.

To run a Java application as a background process and keep it running forever, you can use a process manager like systemd on Linux. Here's how you can set up a systemd service to run your Java application:

Certainly! Here are the steps named as per their actions:

Step 1: Create Service File

Create a new systemd service file for your Java application using a text editor:

sudo nano /etc/systemd/system/myapp.service

Step 2: Configure Service

Paste the following configuration into the file, replacing <jar-file-name> with the name of your JAR file:

Step-by-Step Guide to Identifying and Terminating Processes on Specific Ports

Introduction

This markdown provides a step-by-step guide to identify and terminate processes running on a specific port, catering to both Unix-based and Windows systems.

Handling Processes on a Port

Suppose you encounter an OSError: [Errno 98] Address already in use error while trying to run an application that requires port 8000. This commonly happens when another process is already using the same port.

Method 1: Using curl to Test the Port

One way to check if a process is using port 8000 is by attempting to access it:

curl 127.0.0.1:8000