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restic is the encrypted, deduplicated, incremental backup tool I run in production on several servers. A practical guide to installing it on Debian, setting up an S3-compatible repository, automating daily backups with systemd, and verifying that restore actually works before you need it.
This guide installs PostgreSQL 16 with pgvector on Debian or Ubuntu using the official PGDG repository, creates a dedicated role and database, tunes memory for production, and explains when the HNSW index beats IVFFlat depending on vector volume and the available maintenance window.
Installing Docker on Debian 12 means replacing the Debian docker.io package with the official repository: import the GPG key into /etc/apt/keyrings, install the five packages docker-ce, docker-ce-cli, containerd.io, docker-buildx-plugin and docker-compose-plugin, then set log rotation and live-restore in daemon.json before exposing the server to production.
