Bash Manual - English Documentation

Welcome to the Bash Manual! 📚
Bash (Bourne-Again SHell) is a Unix shell and command language. This guide covers its core features, syntax, and usage scenarios. For deeper exploration, check our Bash Tutorial 📖.

Table of Contents

• Introduction
• Basic Syntax
• Command Execution
• Scripting Essentials
• Advanced Features

Introduction

Bash is the default shell for most Linux distributions and macOS. It's a powerful tool for automating tasks and managing systems.

Basic Syntax

• Commands are executed in the terminal: command arguments
• Pipes (|) redirect output to other commands: ps | grep bash
• Redirection operators:
  • > writes output to a file
  • < reads input from a file
  • >> appends output to a file

Command Execution

• Use . to run scripts in the current shell: . script.sh
• Background processes with &: sleep 10 &
• Job control with fg, bg, and jobs

Scripting Essentials

1. Shebang line: #!/bin/bash
2. Variables: name="Bash"
3. Control structures:
   • if [ condition ]; then ... fi
   • for ... in ...; do ... done
   • while ...; do ... done

Advanced Features

• Arrays: fruits=("apple" "banana")
• Functions:

  greet() {
    echo "Hello, $1!"
  }
  

• Process substitution: (cmd1) | (cmd2)

For more examples, visit our Shell Scripting Guide. 🌟