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Linux Systems

This section serves as a structured knowledge base for Linux systems used in amateur radio, digital voice, SDR, networking, and infrastructure deployments. Documentation is written with long-term operation, security, and maintainability as primary design goals.

Section Under Construction

Individual Linux guides are being developed as formal references. Categories below represent the planned structure and scope of this section.

Distributions

Guides focused on commonly deployed Linux distributions in radio and infrastructure environments.

Debian

  • Base installation and system layout
  • Package management and updates
  • Headless server configuration
Get Started
Active Guide

Ubuntu / Ubuntu Server

  • LTS vs interim releases
  • Cloud and VPS deployments
  • System hardening basics
Coming Soon

Raspberry Pi OS

  • Imaging and first boot
  • Audio and GPIO considerations
  • Long-term stability
Coming Soon

System Administration

Core operating system knowledge required for maintaining Linux-based infrastructure.

Filesystem & Permissions

  • Linux directory structure
  • User, group, and permission models
  • Secure file handling
Coming Soon

systemd & Services

  • Service lifecycle management
  • Autostart and dependencies
  • Logging and recovery
Coming Soon

Networking

  • IP configuration and routing
  • Diagnostics and troubleshooting
  • VPN and remote access basics
Coming Soon

Security

Security-focused documentation for protecting Linux systems exposed to public networks.

Firewall Fundamentals

  • UFW, nftables, and iptables
  • Port exposure strategy
  • Common mistakes
Coming Soon

SSH & Remote Access

  • Key-based authentication
  • Hardening SSH services
  • Access auditing
Coming Soon

Monitoring & Logs

  • Log locations and rotation
  • Basic intrusion detection
  • System health monitoring
Coming Soon