---
title: "Discussion on \"Module 4 - Linux Fundamentals🌀.\" | Hashnode"
description: "Discussion on \"Module 4 - Linux Fundamentals🌀.\". ➡️Command Syntax.\n\n➡️Files and directory permissions(chmod).\n\nhow to remove or add permission?\n\n➡️Permissions using numeric mode.\n\n\n➡️File Ownership Commands(chown, chgrp).\n\n➡️Access Control List (ACL).\nWhat is ACL?- ACL provides an additional, more ..."
url: "https://hashnode.com/posts/module-4-linux-fundamentals/67bc25b6d33234fbee756c08"
---

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# [Module 4 - Linux Fundamentals🌀.](https://biren.hashnode.dev/module-4-linux-fundamentals?utm_source=hashnode&utm_medium=feed)

➡️Command Syntax. ➡️Files and directory permissions(chmod). how to remove or add permission? ➡️Permissions using numeric mode. ➡️File Ownership Commands(chown, chgrp). ➡️Access Control List (ACL). What is ACL?- ACL provides an additional, more ...

Feb 24, 2025 · 3 min read · biren.hashnode.dev  
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-   [#linux-fundamentals](https://hashnode.com/tag/linux-fundamentals)
-   [#linux](https://hashnode.com/tag/linux)
-   [#ubuntu](https://hashnode.com/tag/ubuntu)
-   [#linux-commands](https://hashnode.com/tag/linux-commands)
-   [#basics](https://hashnode.com/tag/basics)

## Written by

[Birendra Kumar Chaudhary](https://hashnode.com/@birendra353)

@birendra353 · Nepal, kathmandu

  
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🌐 DevOps Enthusiast | Cloud & System Administrator | WordPress Expert With 2+ years of experience, I specialize in cloud infrastructure, server management, and WordPress development. At Appharu PVT. LTD., I optimize systems, reduce costs, and implement monitoring solutions. Experienced in deploying 50+ WordPress sites, AWS S3 integration, and troubleshooting technical issues, I’m focused on performance, security, and continuous learning in DevOps and automation.

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