Greums

Essential tcpdump commands and filters for everyday network troubleshooting on Linux.

For years Green IT was a shared professional responsibility. Then generative AI arrived and the ecological discourse went quiet. But the numbers did not.

Deploy a self-hosted GitLab Runner for homelab CI/CD and use it to run Ansible playbooks safely on private LAN services.

A step-by-step migration from named volumes to bind mounts in Docker Compose, including backup, data copy, validation, and rollback.

A practical, low-friction dotfiles workflow with GNU Stow and Git that scales across machines.

Blockchain is a tamper-evident, append-only ledger secured by cryptographic hashes and distributed consensus. Build one in pure Python to understand how it works.