Restic
Reference guide for restic, an encrypted deduplicating backup program. Covers installation, repository backends, backups, snapshot retention, restores, maintenance, and systemd automation.
Linux
Rsync
Reference for rsync file synchronization: delta transfer, SSH and daemon modes, exclude rules, checksum comparison, bandwidth limits, and automated backups via cron, systemd, and inotify.
SMB / Samba
Reference for SMB protocol versions, Samba server installation and share configuration, encryption, VFS modules, performance tuning, audit logging, and client setup on Linux and Windows.
SQLite
Reference for SQLite as a serverless, single-file relational database: installation, schema and data management, transactions, WAL mode, locking, pragmas, indexing, backups, and performance tuning.
Tailscale
A mesh VPN built on WireGuard that connects devices across networks with NAT traversal and centralized access control. Covers installation, subnet routing, exit nodes, MagicDNS, ACLs, Tailscale SSH/Funnel, and …
TLS Handshake
How a client and server negotiate encryption, authenticate, and derive session keys over TLS 1.2 and 1.3. Covers cipher suite negotiation, certificate chain validation, session resumption, and JA3/JA4 fingerprinting.
UFW
Reference for UFW: rule files, application profiles, rule syntax, IPv6 handling, rate limiting, NAT and port forwarding via before.rules, logging, and troubleshooting.
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.