Shell Scripting for DevOps

Zero to hero. Bash basics → real DevOps automation.

Udaan Batch 11 · TrainWithShubham

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Start here

git clone <this-repo>
cd Shell-Scripting-For-DevOps/practice-scripts
bash 01_hello.sh

Then keep going — 02, 03, 04 … all the way to 19.

Full guide: practice-scripts/README.md

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The path

Folder	What's inside
practice-scripts/	19 numbered scripts. Your zero-to-hero journey. Start here.
day01/ → day03/	Live class scripts, day-by-day. Reference + history.
log-files/	Sample logs for grep / awk / tail practice.

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How to practice

1. Read the script (5 mins).
2. Run it. See output.
3. Break it on purpose — change a variable, remove a quote, swap -eq for -ne.
4. Rewrite it from scratch without looking. This is where learning sticks.
5. Move to the next number.

Stuck? bash -x script.sh shows every line as it runs.

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The 6 things you'll actually learn

• Variables & input — read, $1, $(date)
• Conditionals — if, [[ ]], file tests -f
• Loops — for, while, C-style counters
• Functions — reuse code, pass args
• Error handling — set -e, exit codes, && / ||
• Real stuff — user creation, system info, backups + cron, AWS EC2, Docker deploys

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Mini-projects in this repo

• Backup automation → practice-scripts/19_backup.sh — tar/gzip + cron
• Django deploy → day03/deploy_django_app.sh — git + docker
• EC2 provisioning → day03/create_ec2.sh — AWS CLI + polling

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Need help?

• man bash — the source of truth
• tldr <command> — examples that actually make sense
• crontab.guru — cron expressions
• shellcheck.net — paste your script, find bugs

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Likhna shuru karo. Galtiyaan karo. Phir se likho. Bas yahi tarika hai.