What an MX record is, how priorities and backup servers work, the rules MX targets must follow, and how to check and change MX records without losing mail.
Open source licenses explained for business: how MIT, Apache 2.0, GPL, LGPL and AGPL differ, and what each means for products you build or sell.
What makes a strong password today, why length beats symbols and substitutions, how passphrases work, and simple rules for staff and admins.
How to plan a mobile app MVP: validating before building, choosing platforms, scoping features, beta testing and the safety nets to include from day one.
Subdomain vs subdirectory for your blog, shop, app or regional site: how each works technically, what it means for SEO, security and hosting.
How to build a software product roadmap that links goals to work: formats, prioritisation methods, common pitfalls and how to keep it current.
What really drives web app development cost: scope, roles, integrations, team model and upkeep, plus practical ways to get an accurate quote.
A practical server maintenance checklist with daily, weekly, monthly and quarterly tasks, plus the Linux commands to carry each one out.
Static vs dynamic IP addresses compared: how each works, when a business genuinely needs a static IP, and cheaper alternatives like dynamic DNS and VPNs.
How to measure AI ROI honestly: set a baseline, count the full costs, attribute benefits fairly, and decide whether to scale or stop.
Microsoft 365 vs Google Workspace compared for business: email, documents, collaboration, admin, security and migration, to help you pick the right suite.
A practical order of attack for MySQL performance tuning: measure first, fix slow queries and indexes, then tune memory and server settings.
