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How to Check Whether a PDF Is Safe to Open

· 8 min read
Pere Pages
Software Engineer
A blank document page inspected under a magnifying glass beside a checkmark safety shield

A PDFPortable Document Format — is usually just a document. But the format can also carry active features: links, forms, embedded files, automatic actions, multimedia, and sometimes JavaScript. That's what makes "is this PDF safe?" a fair question — and also a slightly wrong one.

Segmenting a Home Network with Omada — VLANs, SSIDs, DHCP Reservations and Firewall Rules

· 8 min read
Pere Pages
Software Engineer
Omada network topology with segmented VLANs

A flat home network puts your laptop, your IoT gadgets, and your guests on the same wire. Here's how I carved my house into isolated zones with TP-Link Omada — VLANs, dedicated SSIDs, DHCP reservations, and firewall rules that actually keep them apart.

I recently reorganized my home network using a TP-Link Omada setup. The goal was not to build an enterprise-grade network, but to get something cleaner, safer, and easier to reason about.

What Actually Makes a Good Life?

· 5 min read
Pere Pages
Software Engineer

If you've ever wondered what really moves the needle on happiness and health, the 85-year Harvard Study of Adult Development has a blunt answer: take care of your body and your relationships. That's it. Well… mostly.

TL;DR

  • Health basics matter: eat decently, move daily, avoid substances.
  • Relationships matter more: the quality of close ties predicts happiness, health, and longevity.

How Your Baby's Vision Develops in the First Year

· One min read
An infant gazing up at a mobile of simple shapes that shift from blurry to sharp, in a gentle pastel and muted indigo palette

Have you ever wondered how a baby sees the world? Take a look at what they see as their vision develops over the first year.

note

This is a general overview of typical development — every baby is different and the ranges vary. It isn't medical advice; if you have any concern about your child's eyes or vision, talk to your pediatrician.

References

How to Fix Espresso Extractions: Sour, Bitter, Fast, Slow, and Channeling

· One min read
Pere Pages
Software Engineer
A portafilter pouring a rich espresso shot with crema into a glass cup, coffee grounds scattered around the base in warm brown tones

Have you ever wondered, "Why is my espresso shot running too fast or too slow? Why does my espresso taste sour or bitter? Why am I not getting any crema? Why am I getting channeling?" This video covers some common espresso issues and how to fix them.

  • 0:59 Shots Too Fast/Slow
  • 4:42 Shots Too Sour/Bitter
  • 8:08 No Crema
  • 10:07 Channeling

Kuchisabishii: The Japanese Word for Eating Out of Boredom

· One min read
Pere Pages
Software Engineer
A person absently reaching into a snack bowl while idle on a couch, capturing the wistful mood of eating out of boredom

"Eating out of boredom happens to the best of us, but kuchisabishii is about shaping it as a natural feeling and a forgiving experience, rather than to shove down those feelings. For once we recognize and confront it, we end up making better decisions after the fact than exacerbating self-sabotaging behavior on guilt-triggered impulses."

Kaki Okumura.