Linux Fundamentals

Learning Linux terminal commands, shell scripting, and system monitoring as part of cloud infrastructure engineering.

What This Repository Contains

• Shell scripts for system monitoring
• Practice exercises from OverTheWire Bandit (levels 0-15)
• Notes from learning Linux commands

Projects

System Health Check Script

A Bash script that monitors CPU usage, memory usage, and disk usage on MacOS and Linux. Logs warnings when any metric crosses a configurable threshold.

How to run it:

git clone git@github.com:YOURUSERNAME/linux-fundamentals.git
cd linux-fundamentals
chmod +x health_check.sh
./health_check.sh

What it does:

• Checks disk usage and warns if above 80%
• Checks memory usage and warns if above 80%
• Checks CPU usage and warns if above 90%
• Logs all results with timestamps to health_log.txt

Skills Practiced

• Linux filesystem navigation
• File permissions and ownership
• Process management
• Shell scripting with Bash
• Log file analysis with grep, awk, sed

Tools Used

• Bash
• MacOS Terminal / Linux Terminal
• OverTheWire Bandit for practice challenges