Notes

systemd-journald and Journal Persistence: What Happened Right Before It Died, Hands-On

A sysadmin guide to systemd-journald persistence: where the journal actually lives, the two steps that make it survive reboots, the size and retention knobs that stop it eating the disk, the silent ways entries still go missing right before a crash, and the journalctl calls that read the previous boot once the machine has already come back up.

Passkeys for Sysadmins: What Actually Happens on the Wire, Hands-On

A sysadmin-grade walkthrough of what actually happens on the wire with passkeys and WebAuthn: the registration and authentication ceremonies, discoverable credentials, what sync really costs you, hardware keys, phishing resistance and its limits, recovery planning, FIDO2 SSH keys, and the honest list of where passkeys do not apply.

I Replaced Zapier with Self-Hosted n8n for 6 Months – Here's What Happened