Learning – Bash Scripting

This repository documents my hands-on journey through the learning of Bash, where I built a deep and practical foundation in Bash scripting — the backbone of modern DevOps and automation workflows.

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🎮 Bash Battle Arena – Game Mode Scripting

The Bash Battle Arena is a simulation-based CLI game created to train DevOps thinking. I completed all 15 levels, each introducing a new challenge in scripting automation:

Level	Script	Concept
1	level01_arena_setup.sh	File creation
2	level02_loop_numbers.sh	Loops
3	level03_hero_check.sh	File presence conditions
4	level04_file_ops.sh	Copy files, check existence
5	level05_boss1.sh	Combined logic & file ops
6	level06_argument_lines.sh	Count file lines by arg
7	level07_sort_txt.sh	Sort files by size
8	level08_log_searcher.sh	Search across .log files
9	level09_directory_monitor.sh	Directory change monitoring
10	level10_boss2.sh	Multi-step file handling
11	level11_disk_alert.sh	Disk usage checker
12	level12_config_parser.sh	Parse config files
13	level13_backup_rotator.sh	Keep latest 5 backups only
14	level14_menu_script.sh	Build interactive menus
15	level15_boss3_menu.sh	Full menu + backups + status

➡️ All scripts are in the battle_arena/ folder.

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🛠️ Extra Scripts (from Creative & Challenge Tasks)

Script Name	Description
log_searcher.sh	Search across all .log files recursively
monitor_directory.sh	Logs file changes with timestamps
backup_rotator.sh	Keeps only the 5 latest backups
config_parser.sh	Reads KEY=VALUE pairs from config files
disk_usage_alert.sh	Alerts if disk usage exceeds threshold

➡️ Located in the extras/ folder.

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🧠 Key Takeaways

• 📁 I learned how to structure reusable scripts for real-world DevOps tasks
• 🔁 Loops, flags, and conditionals became second nature
• ⚠️ I practiced error-proof scripting using set -eux and exit codes
• 📜 I learned to read logs, process files, and script backups, alerts, and monitors
• 🧰 Bash became a toolbox, not just a language

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🗃️ GitHub Portfolio Value

✅ 50+ real Bash scripts
✅ Covers all DevOps scripting building blocks
✅ Demonstrates structure, readability, and CLI thinking
✅ Ready to plug into Ansible, CI/CD, cron jobs, or IaC logic