UFW
Reference for UFW: rule files, application profiles, rule syntax, IPv6 handling, rate limiting, NAT and port forwarding via before.rules, logging, and troubleshooting.
Linux
User Management
Reference for managing Linux users, groups, permissions, ACLs, quotas, and authentication policies. Covers user and group operations, UID/GID ranges, sudo configuration, PAM password policies, and account auditing.
Virsh Command Line Interface
Command-line management of KVM/QEMU virtual machines through libvirt: VM lifecycle, snapshots, networking, image creation, and shell automation.
WireGuard
Reference for the WireGuard VPN protocol covering keys, interface and peer config, masquerading, key rotation, firewall integration, and debugging on Linux.
ZFS
Reference for OpenZFS on Linux covering pool creation, datasets, snapshots, send/receive replication, RAID-Z, ARC tuning, scrub/resilver, properties, and troubleshooting.
FOSS Applications
A curated list of free and open source software for Linux, Windows, macOS, and Android, grouped by purpose with GitHub and F-Droid links.