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Scripting Essentials

Scripting separates the efficient from the overwhelmed
If you're typing the same commands more than twice you're doing it wrong. Scripting automates the tedious, scales your operations, and turns one-time tasks into repeatable procedures

Why Scripting is Non-Negotiable

Security work involves repetitive tasks: * Scanning hundreds of IPs * Parsing thousands of log lines * Automating exploit delivery * Processing large datasets * Orchestrating multi-step attacks * Building custom security tools

Without scripting you're manually repeating work
With scripting you automate everything and focus on the interesting problems

Which Language?

Bash - System automation, command orchestration, quick tasks Python - Complex logic, data processing, tool building, API interaction PowerShell - Windows administration, Active Directory automation Go - High-performance tools, cross-platform binaries Ruby - Metasploit modules, web automation

The Automation Mindset

  1. If you do it twice -- script it
  2. If you do it three times -- improve the script
  3. If you do it weekly -- schedule the script
  4. If it's critical -- add error handling and logging
  5. If others use it -- add help and documentation

Common Secure Scripting Patterns

# Input validation
if [ -z "$1" ]; then
    echo "Usage: $0 <target>"
    exit 1
fi

# Error handling
command || { echo "Failed"; exit 1; }

# Logging
log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> script.log; }

# IDEMPOTENCY - check before creating
if [ ! -f "$output_file" ]; then
    touch "$output_file"
fi