Sysinfo Fetch

#!/usr/bin/env bash
# sysinfo-fetch — Sysinfo Fetch reference tool. Use when working with sysinfo fetch in sysops contexts.
# Powered by BytesAgain | bytesagain.com | hello@bytesagain.com
set -euo pipefail

VERSION="2.0.0"

show_help() {
    cat << 'HELPEOF'
sysinfo-fetch v$VERSION — Sysinfo Fetch Reference Tool

Usage: sysinfo-fetch <command>

Commands:
  intro           Overview and core concepts
  quickstart      Getting started guide
  patterns        Common patterns and best practices
  debugging       Debugging and troubleshooting
  performance     Performance optimization tips
  security        Security considerations
  migration       Migration and upgrade guide
  cheatsheet      Quick reference cheat sheet
  help              Show this help
  version           Show version

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HELPEOF
}

cmd_intro() {
    cat << 'EOF'
# Sysinfo Fetch — Overview

## What is Sysinfo Fetch?
Sysinfo Fetch (sysinfo-fetch) is a specialized tool/concept in the sysops domain.
It provides essential capabilities for professionals working with sysinfo fetch.

## Key Concepts
- Core sysinfo fetch principles and fundamentals
- How sysinfo fetch fits into the broader sysops ecosystem  
- Essential terminology every practitioner should know

## Why Sysinfo Fetch Matters
Understanding sysinfo fetch is critical for:
- Improving efficiency in sysops workflows
- Reducing errors and downtime
- Meeting industry standards and compliance requirements
- Enabling better decision-making with accurate data

## Getting Started
1. Understand the basic sysinfo fetch concepts
2. Learn the standard tools and interfaces
3. Practice with common scenarios
4. Review safety and compliance requirements
EOF
}

cmd_quickstart() {
    cat << 'EOF'
# Sysinfo Fetch — Quick Start Guide

## Prerequisites
- Basic understanding of sysops concepts
- Required tools and access credentials
- System meeting minimum requirements

## Installation
1. Download or clone the sysinfo fetch package
2. Install dependencies
3. Configure initial settings
4. Verify installation

## First Steps
1. Run the hello-world example
2. Review the default configuration
3. Try a simple real-world task
4. Explore available commands and options

## Next Steps
- Read the full documentation
- Join the community forum
- Try advanced features
- Set up automated workflows
EOF
}

cmd_patterns() {
    cat << 'EOF'
# Sysinfo Fetch — Common Patterns & Best Practices

## Design Patterns
1. **Standard Pattern**: The most common approach for sysinfo fetch
2. **Scalable Pattern**: For high-volume or distributed scenarios
3. **Resilient Pattern**: For fault-tolerant implementations

## Best Practices
- Follow the principle of least privilege
- Use version control for all configurations
- Implement comprehensive logging
- Test changes in staging before production
- Document all custom configurations

## Anti-Patterns to Avoid
- Hardcoding credentials or configuration
- Skipping validation and error handling
- Ignoring monitoring and alerting
- Making changes without documentation
- Over-engineering simple solutions
EOF
}

cmd_debugging() {
    cat << 'EOF'
# Sysinfo Fetch — Debugging Guide

## Common Errors
1. **Connection refused**: Check service status and network
2. **Permission denied**: Verify credentials and access rights
3. **Timeout**: Check network, increase limits, optimize queries
4. **Invalid input**: Validate data format and encoding

## Debugging Tools
- Built-in logging and diagnostics
- Network analysis tools (tcpdump, wireshark)
- System monitoring (top, htop, iostat)
- Application-specific debug modes

## Debug Workflow
1. Reproduce the issue consistently
2. Check logs for error messages
3. Isolate the failing component
4. Test with minimal configuration
5. Apply fix and verify
EOF
}

cmd_performance() {
    cat << 'EOF'
# Sysinfo Fetch — Performance Optimization

## Key Metrics
- Response time / latency
- Throughput / operations per second
- Resource utilization (CPU, memory, I/O)
- Error rate and retry frequency

## Optimization Strategies
1. **Caching**: Reduce redundant operations
2. **Batching**: Group small operations
3. **Indexing**: Speed up data lookups
4. **Compression**: Reduce data transfer size
5. **Parallel Processing**: Utilize multiple cores

## Monitoring
- Set up baseline performance metrics
- Configure alerts for anomalies
- Track trends over time
- Regular capacity planning reviews
EOF
}

cmd_security() {
    cat << 'EOF'
# Sysinfo Fetch — Security Considerations

## Authentication & Authorization
- Use strong, unique credentials
- Implement role-based access control
- Enable multi-factor authentication where possible
- Regularly review and rotate credentials

## Data Protection
- Encrypt data at rest and in transit
- Implement proper backup procedures
- Follow data retention policies
- Sanitize inputs to prevent injection

## Network Security
- Use firewalls and network segmentation
- Monitor for suspicious activity
- Keep all software patched and updated
- Disable unnecessary services and ports
EOF
}

cmd_migration() {
    cat << 'EOF'
# Sysinfo Fetch — Migration & Upgrade Guide

## Pre-Migration Checklist
- [ ] Current system fully documented
- [ ] Complete backup taken and verified
- [ ] Target environment prepared
- [ ] Rollback plan documented
- [ ] Stakeholders notified

## Migration Steps
1. Prepare target environment
2. Export data from source
3. Transform data if needed
4. Import to target
5. Verify data integrity
6. Update configurations
7. Test all functionality
8. Switch traffic / go live

## Post-Migration
- Monitor for errors and performance
- Verify all integrations working
- Update documentation
- Decommission old system after confirmation
EOF
}

cmd_cheatsheet() {
    cat << 'EOF'
# Sysinfo Fetch — Quick Reference

## Essential Commands
| Command | Description |
|---------|-------------|
| help | Show available commands |
| version | Display version info |
| intro | Overview and fundamentals |
| troubleshooting | Common problems and fixes |

## Common Workflows
1. **Setup**: install → configure → verify → test
2. **Daily**: check → monitor → report → review
3. **Issue**: diagnose → isolate → fix → verify → document

## Key Shortcuts
- Use tab completion for commands
- Check logs first when troubleshooting
- Always backup before making changes
- Document everything you change
EOF
}

CMD="${1:-help}"
shift 2>/dev/null || true

case "$CMD" in
    intro) cmd_intro "$@" ;;
    quickstart) cmd_quickstart "$@" ;;
    patterns) cmd_patterns "$@" ;;
    debugging) cmd_debugging "$@" ;;
    performance) cmd_performance "$@" ;;
    security) cmd_security "$@" ;;
    migration) cmd_migration "$@" ;;
    cheatsheet) cmd_cheatsheet "$@" ;;
    help|--help|-h) show_help ;;
    version|--version|-v) echo "sysinfo-fetch v$VERSION — Powered by BytesAgain" ;;
    *) echo "Unknown: $CMD"; echo "Run: sysinfo-fetch help"; exit 1 ;;
esac