Shell Scripting and Automation

Bash Scripting Fundamentals

• What you Need to Know

  • Script Structure and Execution

    • Shebang lines and script interpreters
    • Script permissions and execution methods
    • Script debugging and error handling basics
    • Resources:
      • Bash Scripting Tutorial - Linux Config - Comprehensive beginner's guide to bash scripting
      • Advanced Bash Scripting Guide - TLDP - Complete reference for bash scripting
      • Shell Scripting Primer - Apple Developer - Shell scripting concepts and best practices

  • Variables and Data Types

    • Variable declaration, assignment, and scope
    • String manipulation and text processing
    • Arrays and associative arrays in bash
    • Resources:
      • Bash Variables Guide - LinuxHint - Variable usage and manipulation
      • String Manipulation - Bash Hackers - Advanced string processing techniques
      • Bash Arrays Tutorial - Tecmint - Array operations and usage

  • Input and Output Operations

    • Reading user input and command line arguments
    • Output formatting and redirection in scripts
    • File input/output and data processing
    • Resources:
      • Bash Input/Output - DigitalOcean - I/O operations in shell scripts
      • Command Line Arguments - GeeksforGeeks - Processing script parameters
      • File Processing - Linux Journey - File manipulation in scripts

Control Structures and Logic

• What you Need to Know

  • Conditional Statements and Decision Making

    • if-then-else statements and nested conditions
    • Case statements for multiple condition handling
    • Test operators and comparison methods
    • Resources:
      • Bash Conditionals - Linuxize - Conditional logic in bash scripts
      • Test Command Tutorial - TLDP - Testing conditions and comparisons
      • Case Statements - Bash Guide - Multi-way branching in scripts

  • Loops and Iteration

    • For loops for iterating over lists and ranges
    • While and until loops for condition-based iteration
    • Loop control with break and continue statements
    • Resources:
      • Bash Loops Tutorial - Tecmint - Comprehensive loop examples and usage
      • For Loop Guide - LinuxHint - For loop variations and applications
      • While Loop Examples - GeeksforGeeks - While loop implementation patterns

  • Functions and Modular Programming

    • Function definition and parameter passing
    • Local and global variable scope in functions
    • Function return values and exit codes
    • Resources:
      • Bash Functions Guide - DigitalOcean - Function creation and usage
      • Function Best Practices - Bash Hackers - Function design and implementation
      • Modular Scripting - Linux Config - Script organization and modularity

Advanced Scripting Techniques

• What you Need to Know

  • Regular Expressions and Pattern Matching

    • Basic and extended regular expression syntax
    • Pattern matching with grep, sed, and awk
    • Text processing and data extraction techniques
    • Resources:
      • Regular Expressions Tutorial - RegexOne - Interactive regex learning platform
      • Sed and Awk Guide - Grymoire - Advanced text processing tools
      • Regex in Bash - TLDP - Regular expressions in shell scripts

  • Error Handling and Debugging

    • Exit codes and error status handling
    • Debugging techniques and script testing
    • Logging and error reporting in scripts
    • Resources:
      • Bash Error Handling - LinuxHint - Error management and recovery
      • Script Debugging - DigitalOcean - Debugging techniques and tools
      • Bash Strict Mode - Aaron Maxwell - Defensive scripting practices

  • Process Management and Background Jobs

    • Running processes in background and foreground
    • Process synchronization and job control
    • Inter-process communication and signal handling
    • Resources:
      • Process Control - TLDP - Advanced process management
      • Background Jobs - Bash Manual - Job control and process management
      • Signal Handling - GeeksforGeeks - Signal processing in scripts

System Administration Scripts

• What you Need to Know

  • System Monitoring and Reporting Scripts

    • System resource monitoring and alerting
    • Log analysis and report generation
    • Performance metrics collection and visualization
    • Resources:
      • System Monitoring Scripts - Tecmint - Automated system monitoring
      • Log Analysis Scripts - Linux Journal - Log processing and analysis
      • Performance Monitoring - Red Hat - System performance scripting

  • Backup and Maintenance Automation

    • Automated backup scripts and scheduling
    • System cleanup and maintenance tasks
    • Database backup and recovery automation
    • Resources:
      • Backup Scripts - DigitalOcean - Automated backup solutions
      • System Maintenance - Linux Config - Maintenance task automation
      • Database Backup Scripts - Linuxize - Database automation scripts

  • User Management and Security Scripts

    • User account provisioning and deprovisioning
    • Security auditing and compliance checking
    • Access control and permission management
    • Resources:
      • User Management Scripts - Red Hat - Automated user administration
      • Security Auditing Scripts - SANS - Security automation and auditing
      • Access Control Automation - Linux Security - Permission management scripts

Configuration Management and Deployment

• What you Need to Know

  • Configuration File Management

    • Template-based configuration generation
    • Configuration validation and testing
    • Version control for configuration files
    • Resources:
      • Configuration Management - Ansible - Automated configuration management
      • Template Processing - Jinja2 - Configuration templating
      • Git for Configuration - Atlassian - Version control for system configs

  • Application Deployment Scripts

    • Automated application installation and updates
    • Service deployment and configuration
    • Rollback and recovery procedures
    • Resources:
      • Deployment Automation - DigitalOcean - Automated deployment strategies
      • Service Management Scripts - Systemd - Service automation and management
      • Blue-Green Deployment - Martin Fowler - Deployment pattern implementation

  • Infrastructure Provisioning

    • Server provisioning and initialization scripts
    • Environment setup and dependency management
    • Infrastructure testing and validation
    • Resources:
      • Infrastructure Scripts - Terraform - Infrastructure automation
      • Server Provisioning - Cloud-Init - Automated server initialization
      • Environment Management - Docker - Containerized environment setup

Text Processing and Data Manipulation

• What you Need to Know

  • Advanced Text Processing with Sed and Awk

    • Stream editing and text transformation with sed
    • Pattern scanning and data extraction with awk
    • Complex text processing pipelines
    • Resources:
      • Sed Tutorial - Grymoire - Comprehensive sed guide and examples
      • Awk Programming - GNU - Complete awk programming reference
      • Text Processing Examples - TLDP - Practical text processing scenarios

  • Data Parsing and Format Conversion

    • CSV, JSON, and XML data processing
    • Data validation and format conversion
    • Report generation and data visualization
    • Resources:
      • JSON Processing - jq Manual - Command-line JSON processor
      • CSV Processing - Miller - CSV data manipulation tool
      • XML Processing - XMLStarlet - XML command-line toolkit

  • Log Analysis and Reporting

    • Log file parsing and analysis techniques
    • Statistical analysis and trend identification
    • Automated report generation and alerting
    • Resources:
      • Log Analysis Guide - Elastic - Log processing and analysis
      • Statistical Analysis - GNU Datamash - Command-line statistics tool
      • Reporting Scripts - Linux Journal - Automated report generation

Network and API Automation

• What you Need to Know

  • Network Configuration and Monitoring

    • Network interface configuration scripts
    • Network connectivity testing and monitoring
    • Firewall rule management and automation
    • Resources:
      • Network Automation - Red Hat - Network configuration automation
      • Network Monitoring Scripts - Nagios - Network monitoring and alerting
      • Firewall Automation - DigitalOcean - Automated firewall management

  • API Integration and Web Services

    • REST API consumption with curl and wget
    • JSON and XML data processing from APIs
    • Web service integration and automation
    • Resources:
      • cURL Tutorial - Everything cURL - Complete cURL reference and examples
      • API Testing - Postman - API testing and automation
      • Web Scraping - Beautiful Soup - Web data extraction techniques

  • Cloud Service Integration

    • Cloud provider CLI integration and automation
    • Infrastructure management through APIs
    • Multi-cloud deployment and management scripts
    • Resources:
      • AWS CLI Scripting - AWS - AWS automation examples
      • Azure CLI Scripts - Microsoft - Azure automation techniques
      • Google Cloud Scripts - Google - GCP automation and scripting

Testing and Quality Assurance

• What you Need to Know

  • Script Testing Frameworks

    • Unit testing for shell scripts
    • Integration testing and test automation
    • Test-driven development for scripts
    • Resources:
      • Bats Testing Framework - Bash automated testing system
      • ShellCheck - Static Analysis - Shell script analysis and linting
      • Script Testing Guide - Google - Shell scripting best practices

  • Code Quality and Standards

    • Shell script linting and style checking
    • Code review practices and standards
    • Documentation and maintainability
    • Resources:
      • Shell Style Guide - Google - Shell scripting style standards
      • Bash Best Practices - Wooledge - Common pitfalls and best practices
      • Code Review Guidelines - GitHub - Code review process and tools

  • Performance Optimization

    • Script performance profiling and optimization
    • Resource usage monitoring and optimization
    • Scalability considerations for automation scripts
    • Resources:
      • Bash Performance - Linux Performance - Script performance analysis
      • Optimization Techniques - Advanced Bash - Performance optimization strategies
      • Profiling Tools - GNU - Bash profiling and debugging

DevOps Integration and CI/CD

• What you Need to Know

  • Version Control Integration

    • Git hooks and automation triggers
    • Continuous integration pipeline scripts
    • Automated testing and deployment workflows
    • Resources:
      • Git Hooks Tutorial - Atlassian - Git automation and triggers
      • CI/CD Pipelines - GitHub Actions - Automated workflow creation
      • Jenkins Scripting - Jenkins - Pipeline automation and scripting

  • Container and Orchestration Integration

    • Docker container management scripts
    • Kubernetes deployment and management automation
    • Container registry and image management
    • Resources:
      • Docker Automation - Docker - Container management scripting
      • Kubernetes Scripts - Kubernetes - Kubernetes automation examples
      • Container Orchestration - Red Hat - Orchestration automation concepts

  • Infrastructure as Code

    • Terraform and infrastructure automation
    • Configuration management with Ansible
    • Infrastructure testing and validation
    • Resources:
      • Terraform Scripting - HashiCorp - Infrastructure automation with Terraform
      • Ansible Automation - Red Hat - Configuration management automation
      • Infrastructure Testing - Test Kitchen - Infrastructure testing frameworks

Security and Compliance Automation

• What you Need to Know

  • Security Scanning and Auditing

    • Vulnerability scanning automation
    • Security compliance checking scripts
    • Automated security reporting and alerting
    • Resources:
      • Security Automation - NIST - Security automation guidelines
      • Vulnerability Scanning - OpenVAS - Automated vulnerability assessment
      • Compliance Automation - Chef InSpec - Infrastructure compliance testing

  • Access Control and Identity Management

    • User provisioning and deprovisioning automation
    • Role-based access control implementation
    • Identity synchronization and management
    • Resources:
      • Identity Management - FreeIPA - Identity and access management
      • LDAP Automation - OpenLDAP - Directory service automation
      • Access Control Scripts - Red Hat - Automated access management

  • Incident Response and Recovery

    • Automated incident detection and response
    • System recovery and rollback procedures
    • Forensic data collection and analysis
    • Resources:
      • Incident Response - SANS - Incident response automation
      • System Recovery Scripts - Red Hat - Automated recovery procedures
      • Forensic Tools - CAINE - Digital forensics automation

Ready to Continue? Advance to Module 4: Networking and Security to master network configuration, security hardening, and system protection!