🐚 Shell Scripting Survival Guide

📚 Documentation

Click a picture to open the full guide and its video:

Bash Tutorial Your first scripts, step by step Script Template Production-grade script, with tests Arguments and Options $1, getopts and long options Bash Functions Scope, results and libraries Error Handling set -e, trap, retry and pipefail Bash Gotchas The surprises that bite everyone POSIX sh vs Bash Scripts that run everywhere awk and sed in Scripts Reports, edits and traps jq in Scripts JSON in shell scripts, safely Python The next step for longer scripts Scheduling and Monitoring Cron jobs that do not fail silently

Watch the whole series on YouTube

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For when bash scripting saves the day (or ruins it).

Golden Rules

1. set -euo pipefail — Your script's safety net
2. Always quote your variables: "$VAR" not $VAR
3. Test for sudo at the start of admin scripts

Essential Snippet

#!/usr/bin/env bash
# Always start with this
set -euo pipefail

# Check for root
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" >&2
   exit 1
fi

# Your code here
echo "Deploying to production..."

Coming Soon

• More shell scripting guides, as they get written up