diff --git a/IT Sofware Engineering Training/month-01/week-01/day-01/ComputerSystems-Linux-Virtualization.md b/IT Sofware Engineering Training/month-01/week-01/day-01/ComputerSystems-Linux-Virtualization.md
index 39f35c3..c224cb5 100644
--- a/IT Sofware Engineering Training/month-01/week-01/day-01/ComputerSystems-Linux-Virtualization.md	
+++ b/IT Sofware Engineering Training/month-01/week-01/day-01/ComputerSystems-Linux-Virtualization.md	
@@ -1,20 +1,113 @@
-# **Computer Systems, Linux & Virtualization**
+### **One-Day Training & Lab Activity Plan: Computer Systems, Virtualization, and Linux Fundamentals**  
+**Target Audience:** IT Professionals, System Administrators, or Developers  
+**Prerequisites:** Basic computer literacy. Pre-install VirtualBox and download CentOS/RHEL ISO (instructions sent prior).  
 
-## Topics :
-**Computer Systems & Virtualization**
-1. Introduction to Computer System Basics and Network Fundamentals
-2. Bare Metal vs Virtualization vs Containerization
-3. Overview of virtualization with VirtualBox: purpose, benefits, and system requirements
+---
 
-**Linux OS Fundamentals (CentOS/RHEL)**
-1. Introduction to Linux: history, distributions, and why CentOS/RHEL is preferred in enterprises
-2. Basic commands, file system structure, and user permission concepts
+### **Schedule Breakdown**  
+**Total Time:** 8 Hours (Excluding Breaks)  
 
+---
 
-## Contributing
+#### **1. Welcome & Overview (9:00 AM – 9:15 AM)**  
+- **Objective:** Set expectations and outline the day.  
+- **Activity:**  
+  - Quick introductions.  
+  - Overview of training goals and schedule.  
 
-Feel free to submit issues or pull requests.
+---
 
-## License
+#### **2. Lecture: Computer Systems & Network Fundamentals (9:15 AM – 10:15 AM)**  
+- **Topics Covered:**  
+  - Components of a computer system (CPU, RAM, storage, I/O).  
+  - Basics of networking: IP addresses, DNS, DHCP, and subnets.  
+  - Role of OS in resource management.  
+- **Learning Outcome:** Understand how hardware and software interact in networked environments.  
 
-This project is licensed under the MIT License.
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+---
+
+#### **3. Lab 1: Basic Network Configuration (10:30 AM – 11:30 AM)**  
+- **Tools Used:** Command-line (`ipconfig/ifconfig`, `ping`, `nslookup`).  
+- **Activities:**  
+  - Check IP configuration and test connectivity.  
+  - Modify network settings (temporary IP change).  
+  - Troubleshoot a simulated DNS issue.  
+- **Deliverable:** Screenshot of successful `ping` to a gateway and external domain.  
+
+---
+
+#### **4. Lecture + Group Activity: Bare Metal vs Virtualization vs Containerization (11:30 AM – 12:30 PM)**  
+- **Topics Covered:**  
+  - **Bare Metal:** Direct hardware access, performance trade-offs.  
+  - **Virtualization:** Hypervisors (Type 1/2), resource allocation.  
+  - **Containerization:** Lightweight, shared kernel (Docker example).  
+- **Group Activity:**  
+  - Debate use cases (e.g., “When would you choose containers over VMs?”).  
+
+---
+
+#### **5. Lunch Break (12:30 PM – 1:30 PM)**  
+
+---
+
+#### **6. Demo + Lab 2: VirtualBox Setup & VM Creation (1:30 PM – 2:30 PM)**  
+- **Topics Covered:**  
+  - Purpose of VirtualBox (cross-platform VM management).  
+  - System requirements (VT-x/AMD-V, 4GB+ RAM).  
+- **Lab Steps:**  
+  1. Install VirtualBox (if not pre-installed).  
+  2. Create a VM: Allocate resources (2 CPU cores, 4GB RAM, 20GB disk).  
+  3. Attach CentOS ISO and start installation (pre-loaded ISO).  
+- **Deliverable:** VM with CentOS installed (post-reboot).  
+
+---
+
+#### **7. Lecture: Linux Fundamentals (CentOS/RHEL) (2:45 PM – 3:30 PM)**  
+- **Topics Covered:**  
+  - History of Linux and key distributions (Debian vs RHEL).  
+  - Why enterprises prefer CentOS/RHEL (long-term support, security).  
+  - File system hierarchy (`/`, `/etc`, `/var`, `/home`).  
+
+---
+
+#### **8. Lab 3: Linux Commands & File System (3:30 PM – 4:15 PM)**  
+- **Activities:**  
+  - Navigate directories using `cd`, `ls`, `pwd`.  
+  - Create files (`touch`, `nano`), directories (`mkdir`).  
+  - Archive files with `tar` and search using `grep`.  
+- **Deliverable:** A compressed log file containing specific error entries.  
+
+---
+
+#### **9. Lab 4: User Permissions & Final Challenge (4:15 PM – 5:00 PM)**  
+- **Activities:**  
+  - Create users/groups (`useradd`, `groupadd`).  
+  - Modify permissions (`chmod 755`, `chown`).  
+  - **Final Lab:**  
+    - SSH into a VM, create a secure directory for a team, and set permissions.  
+- **Deliverable:** A shared folder accessible only to the `developers` group.  
+
+---
+
+#### **10. Wrap-Up & Q&A (5:00 PM – 5:30 PM)**  
+- **Activity:**  
+  - Recap key takeaways.  
+  - Distribute lab solution guides and additional resources.  
+  - Open floor for questions and feedback.  
+
+---
+
+### **Training Materials Provided:**  
+- Slide decks for lectures.  
+- Step-by-step lab guides with commands.  
+- Pre-configured CentOS VM template (for slower learners).  
+- Cheat sheets for Linux commands and VirtualBox shortcuts.  
+
+### **Instructor Notes:**  
+- Emphasize hands-on troubleshooting during labs.  
+- Encourage peer collaboration for complex tasks.  
+- Adjust time allocations based on group pace.  
+
+--- 
+
+This plan balances theory and practice, ensuring participants gain actionable skills in virtualization and Linux administration.
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