cybersecurity automation

Hands-on, distro-agnostic playbook to harden Linux servers and add lightweight AI detection: patching/auto-updates, service minimization, SSH lockdown, and firewall; auditing with auditd and Lynis; a Python IsolationForest to flag anomalous SSH activity from journals; automated cron runs; optional fail2ban integration for rapid, reversible bans; plus a continuous compliance loop and tuning tips.

A practical guide to build a lightweight Linux AI Security Assistant in Bash: collect SSH failures, network connections, and optional ClamAV results; normalize to JSON; triage with a local (Ollama) or cloud LLM; and safely auto-block attacker IPs via ufw/firewalld/iptables. Includes apt/dnf/zypper installs, a runnable script, systemd timer, notifications, and hardening tips for privacy-focused, scheduled responses.