🖥️ Linux & Storage Systems Lab

Tools: Linux (Ubuntu/WSL), mdadm, Bash CLI
Focus: System administration, RAID configuration, disk management

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📌 Overview

Hands-on lab project simulating real-world Linux system administration tasks including storage management, RAID configuration, and system monitoring all using WSL (Ubuntu).

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✅ What I Did

🔧 Environment Setup

• Installed and configured Ubuntu on WSL (Windows Subsystem for Linux)
• Navigated the Linux filesystem and practised CLI-based workflows

📊 System Monitoring

• Monitored CPU and memory usage using top
• Checked disk space with df -h and memory with free -h
• Listed block devices and partitions using lsblk

🌐 Network Diagnostics

• Ran connectivity tests using ping
• Inspected network interfaces with ip a
• Viewed active connections using netstat

💾 RAID Configuration (mdadm)

• Configured RAID 0 (striping) for performance
• Configured RAID 1 (mirroring) for redundancy
• Simulated disk failure and studied recovery procedures

📋 Log Analysis

• Analysed kernel messages using dmesg
• Queried system logs with journalctl
• Monitored RAID status via /proc/mdstat

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🧠 Key Concepts Learned

• Difference between RAID levels (0, 1, 5, 10) and their trade-offs
• How Linux handles block devices and storage abstraction
• Importance of log monitoring in diagnosing system/disk failures

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📷 Screenshots

1️⃣ Block Devices — lsblk

Lists all storage devices recognized by the system.

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2️⃣ Disk Space Usage — df -h

Shows filesystem sizes and mount points.

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3️⃣ Memory Usage — free -h

Displays RAM and swap usage.

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4️⃣ Network Interfaces — ip a

Shows active network interfaces and IP addresses.

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5️⃣ RAID Module — mdadm --version

Confirms mdadm is installed and ready for RAID configuration on the system.

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📁 Files in This Repo

File	Description
commands.md	All commands used with explanations
raid-notes.md	RAID concepts and recovery steps