2023 Linux Commands Cheat Sheet for Beginners and Experienced Users - IQCode

Introduction to Linux

Linux is a widely used open-source operating system. Many developers prefer Linux for development purposes due to its high performance. It's essential for students and professionals in the software industry to have knowledge of Linux. There are various reasons why Linux is favored over Windows, like greater security and a superior terminal.

What is Linux and why use it?

Before we delve into the nitty-gritty of Linux commands, let's first understand what Linux is and why it's preferred over Windows OS. Linux is an open-source operating system that can be modified and distributed commercially or non-commercially under the guidelines of the GNU General Public License. Here are some advantages of using Linux:

• It's freely available as an open-source OS. With the source code widely available, users can study and modify it according to their needs. This gives users a chance to learn more about the OS.
• It's secure and offers users privacy. It's less prone to cyber-attacks, so there isn't always a need to install heavy antivirus software.
• It's a stable OS that doesn't require frequent restarts.
• It's fast, easy to install, and is network-friendly.

Now that we have a fair idea about the Linux Operating System and its advantages over the Windows OS, let's look at the Linux Cheat Sheet and learn about the Linux Commands.

Here's a cheat sheet with all the important Linux commands along with examples.

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Linux Commands Tutorial: Basics to Advanced

1. File and directory CRUD navigation commands

System Information Commands

In this section, we will cover commands that provide information about the system.

File Permission Commands

This section deals with commands related to managing file permissions:

chmod  - Change access permissions for files and directories

chown  - Change file ownership

chgrp  - Change group ownership of a file

HARDWARE INFORMATION COMMANDS

// This code prints hardware information commands

System.out.println("Hardware Information Commands:");
System.out.println("1. sudo dmidecode -t system");
System.out.println("2. lscpu");
System.out.println("3. lspci");

The above code snippet prints out the three hardware information commands: "sudo dmidecode -t system", "lscpu", and "lspci". These commands can be used to gather information about the system's hardware components.

File and Directory Compression Commands

These are the commands used for file and directory compression in a Unix-based operating system:

1. tar - used to create a single archive file from multiple files and directories.

2. gzip - used to compress a single file.

3. gunzip - used to decompress a single file.

4. tar + gzip - used to compress multiple files and directories into a single, compressed file.

5. zip - used to compress and archive one or more files or directories.

6. unzip - used to decompress a ZIP archive file.

Using these commands can help to reduce the size of files and directories, making them easier to store and transfer.

Environment Variable Commands

//Code for environment variable commands can be added here if required

Environment variable commands are used to manage and manipulate environment variables in a program or script. These commands allow developers to set, get, or delete environment variables, which can impact the behavior and output of the code. Understanding how to use environment variable commands is important for efficient and effective programming.

User Management Commands

// code for user management commands goes here

These commands are used to manage users in the system.

Networking Commands

//Code for networking commands can be added here

These commands can be used to troubleshoot network connectivity issues and configure network settings.