Hello World Bash Script in Dev Container A Comprehensive Guide

Prerequisites

1. Development Environment Setup

• Docker: Installed on your system
• Visual Studio Code: With Remote - Containers extension
• Git: Installed (optional, but recommended)

2. Required Tools

• Docker
• VS Code
• Remote - Containers extension

Step-by-Step Guide

Creating the Project Structure

1. Create Project Directory

   mkdir hello-world-bash
   cd hello-world-bash
   

2. Initialize Project Files

   touch hello_world.sh
   touch .devcontainer/devcontainer.json
   

Configuring Dev Container

1. Dev Container Configuration (.devcontainer/devcontainer.json)

   {
     "name": "Bash Development Container",
     "image": "ubuntu:latest",
     "customizations": {
       "vscode": {
         "extensions": [
           "shakram02.bash-snippets"
         ]
       }
     },
     "postCreateCommand": "apt-get update && apt-get install -y bash",
     "remoteUser": "root"
   }
   

Writing the Bash Script

1. Create Hello World Script (hello_world.sh)

   #!/bin/bash
   
   # Simple Hello World Script
   echo "Hello, World from Bash in Dev Container!"
   

2. Make Script Executable

   chmod +x hello_world.sh
   

Running the Script

1. Execute the Script

   ./hello_world.sh
   

Troubleshooting

Common Issues

• Ensure script has executable permissions
• Check line endings (use LF, not CRLF)
• Verify Docker is running
• Confirm VS Code Remote Containers extension is installed

Potential Error Resolution

# If permission denied
sudo chmod +x hello_world.sh

# If line ending issues
dos2unix hello_world.sh

Best Practices

• Always use shebang (#!/bin/bash)
• Add error handling
• Use meaningful variable names
• Comment your code

Advanced Tips

• Consider using set -e for strict error handling
• Implement input validation
• Use functions for modularity

Recommended VS Code Extensions

• Bash Debug
• Bash Snippets
• ShellCheck (Linting)

Resources

• Bash Scripting Tutorial
• Docker Dev Containers Docs
• VS Code Remote Development

License

MIT License - Feel free to use and modify this guide ```

Contributing

Contributions welcome! Open an issue or submit a pull request.