internal/skills/catalog/lynis/SKILL.md
# lynis — Security Auditing Tool ## Category System Hardening ## License GPLv3 ## Source https://github.com/CISOfy/lynis ## Purpose Comprehensive security auditing and hardening assessment. Checks hundreds of security controls and produces a hardening index with specific recommendations. ## Use Cases - Full system security audit - Compliance checking (CIS, HIPAA, PCI-DSS baselines) - Hardening gap analysis - Periodic posture assessment - Generate remediation recommendations ## Examples ```
npx skillsauth add ggp1/mitiga internal/skills/catalog/lynisInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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System Hardening
GPLv3
https://github.com/CISOfy/lynis
Comprehensive security auditing and hardening assessment. Checks hundreds of security controls and produces a hardening index with specific recommendations.
# Quick system audit
lynis audit system --quick --no-colors --logfile /var/log/lynis.log --report-file /var/log/lynis-report.dat
# Full audit with all tests
lynis audit system --no-colors --logfile /var/log/lynis.log --report-file /var/log/lynis-report.dat
# Show only warnings and suggestions
lynis show warnings
lynis show suggestions
development
# who / w — Logged-in Users ## Category User & Group Management ## License GPLv3+ (GNU coreutils) / GPLv2 (procps-ng) ## Source Included in all Linux distributions. ## Purpose Show who is currently logged in and what they are doing. ## Use Cases - Detect unauthorized active sessions - Monitor interactive logins in real-time - Identify login sources (IP, terminal) - Review idle times for active sessions ## Examples ```bash # All login information who -a # Currently logged-in users with act
development
# useradd / usermod / userdel — User Account Management ## Category User & Group Management ## License BSD-3-Clause (shadow-utils) ## Source https://github.com/shadow-maint/shadow (included in all Linux distributions) ## Purpose Create, modify, and delete user accounts. ## Use Cases - Create service accounts for Mitiga components - Modify user group memberships - Disable or remove compromised accounts - Audit account configurations ## Examples ```bash # Create a system service account (no
development
# ufw — Uncomplicated Firewall ## Category System Hardening ## License GPLv3 ## Source https://code.launchpad.net/ufw (included in Ubuntu/Debian) ## Purpose Simplified interface for managing iptables/nftables rules. ## Use Cases - Quick firewall status checks - Rule modifications on systems using ufw - Block malicious sources during incident response ## Examples ```bash # Show firewall status and rules ufw status verbose # Block a malicious IP ufw deny from <malicious_ip> # Allow a speci
development
# trivy — Comprehensive Vulnerability Scanner ## Category Vulnerability Scanning ## License Apache 2.0 ## Source https://github.com/aquasecurity/trivy (CNCF project) ## Purpose Scan filesystems, container images, Git repositories, and IaC configurations for known vulnerabilities (CVEs), misconfigurations, and exposed secrets. ## Use Cases - Audit project dependencies for known CVEs - Scan configuration files for misconfigurations - Detect embedded secrets in repositories - Scan container im