Technical articles. No filler.
Replace password login with an ed25519 key, then disable PasswordAuthentication and root login entirely. This shuts the door on the automated guessing attempts that hit every public server with tens of thousands of tries a month.
Horizon gives you three numbers that settle everything: throughput, job runtime, and wait time. If wait time climbs while runtime stays flat you need more workers, and if runtime itself grows the problem is your code, not the worker count.
99.99% means about 52 minutes of downtime a year, against nearly 9 hours at 99.9%. We translate the percentages into minutes with a table, and explain what an SLA covers, what it excludes, and how compensation works before you sign.
DNS turns your domain name into your server's address, and mismanaging it is a silent cause of many outages. Here are the core records, how TTL controls propagation, and why missing mail records push your email away from the inbox.
n8n is a visual automation tool that connects your systems to each other and to AI models through drag-and-drop nodes, no code required. Self-hosting keeps your data on your own server with no execution cap, and powers flows like ticket triage, email summaries, and human-reviewed auto-replies.
An audit log answers one question during an incident: who did what, when, and from where. Log logins, permission changes, and sensitive data access, protect the log itself from tampering, and keep it long enough to investigate.
A cron line is five fields: minute, hour, day, month, weekday. Instead of stuffing crontab with dozens of fragile lines, put one line that runs schedule:run every minute and manage all your jobs from code with withoutOverlapping and onOneServer.
Zero-downtime migration is about order, not speed: prepare the new server, test with the hosts file, lower TTL ahead of time, switch DNS, and keep the old server running until it propagates. We detail each step and the high-TTL trap.
Data residency means your data actually lives on servers inside the Kingdom, not a sa domain over a foreign box. We explain residency versus sovereignty, who mandates local hosting, and how to verify your hosting is truly Saudi.
