Why Bash?

• Ubiquitous: Available on virtually every Linux/macOS system
• Powerful: Pipes, redirection, and process substitution
• Simple: Easy to start, deep to master
• Composable: Combines naturally with other CLI tools

Essential Techniques

Safe Scripting

Always start scripts with:

#!/usr/bin/env bash

set -euo pipefail

This catches errors early and prevents silent failures.

Functions Over Scripts

For reusable logic, bash functions in your .bashrc or sourced files are often better than separate scripts.

Arrays and Associative Arrays

Modern bash supports both indexed and associative arrays, making complex data manipulation possible.

My Bash Workflow

I use bash for:

• Development scripts: Build, test, deploy automation
• System administration: User management, backups, monitoring
• Data processing: Log analysis, file transformations
• Dotfiles management: Symlinking, bootstrapping new machines

Tips and Tricks

• Use [[]] instead of [ ] for conditionals
• Quote your variables: "$var"
• Use mapfile for reading files into arrays
• Leverage process substitution: <(command)
• Use trap for cleanup on exit