hi! im miuna
a dev who loves linux and cloud
started programming in autoit when i was a kid and i just cant stop ٩(◕‿◕)۶
lots of sites published since 2008, starting with game blogs, and this one is on the list too!
Java Backend
Linux Enjoyer
AWS CCP
ANBIMA CEA
academic background
- Systems Analysis and Development · Technologist
- Mathematics (Teaching Degree)
- MBA in Macroeconomics & Portfolio Management with Paulo Guedes
- MBA in International Economics
- ANBIMA CEA (C-Pro I / C-Pro R)
- AWS Certified Cloud Practitioner (CCP)
tech stack
main
Java
frontend
Vue.js
fullstack
Rails
cloud
AWS
system
Linux
learning
C / C++ / Lua
| Category | Skills |
|---|---|
| Backend | Java, REST APIs, best practices |
| Frontend | Vue.js, components, state management |
| DevOps | Linux, automation, basic pipelines |
| Cloud | AWS fundamentals, CCP certification |
preferences
os
Fedora / Nobara
email
Proton Mail
browser
Firefox / Zen
git
GitLab > GitHub
office
LibreOffice
reading
Kindle > physical
hobbies & interests
- Games that marked me: Holy Beast Online, GetAmped
- Currently reading: The Sad End of Policarpo Quaresma, The Hitchhiker's Guide to the Galaxy
- Favorite: And Then There Were None
- Hardware: PC building
- Favorite anime: Clannad, Steins;Gate, Ghost Stories
- Shadow PC and GeForce NOW enthusiast
· · ·
work philosophy
PRINCIPLE
Planning and preparation come before action.
CONCERN
"Data has become the main currency of the digital economy, and its value is well known by corporations and governments. The same information that drives innovation can be used to influence people's behavior. To me, defending open platforms, demanding transparency, and acting with caution are the pillars for building a fairer and more balanced digital environment."
BLOG: posts (english)
quick drafts with no formalities. (⌐■_■)
the TADC leak and supply chain security
about the leak of The Amazing Digital Circus.
the gap between the top 0.7% and the top 0.001% is absurd
even though they look like tiny neighbor numbers, the real difference between the top 0.7% and the top 0.001% in any skill is like the gap between a good athlete and a world record holder.
brazil needs to stop ignoring tech education
rant about how brazilian schools still don't have basic access to computers and programming, while the world moves forward.
the whole "pass it to the other side" thing doesn't exist
that whole "pass it dividing" or "change the sign" trick is just something teachers made up. the real thing is the equality principle, and understanding that changes everything.
having a roof was never this hard
housing became speculation, airbnb sucked everything out of the market and even affordable housing turns into extra income. and us who just want a place to sleep?
write whatever i want
rant about the difficulty of starting to write, authenticity and having a space of my own away from social media.
i dont like falling in love
rant about passion, low libido and why finding someone pretty is whatever when theres no emotional bond.
CORS is not just pasting asterisk
every Cloudflare Pages Functions tutorial teaches u to paste Access-Control-Allow-Origin: *. that turns ur API into a revolving door. see how to restrict CORS and tighten CSP.
why we will probably never find anyone in the universe
math says theres life everywhere in the universe. but time and space are abysmally huge so well probably never know.
i renamed a file and lost all comments
i renamed a post and everyone lost the comments. the problem of using filename as key in the database.
my email is too short and nobody believes it
every time i say my email i at cth.jp people think its fake. but its real and works perfectly.
clamav, the antivirus for linux paranoids
linux isnt 100% immune to viruses. clamav is a lightweight free open source antivirus for those who wanna scan files, servers, or just sleep peacefully.
never put a static ip inside the dhcp range
simple explanation of why setting a static ip inside the dhcp pool breaks the whole network. hotel analogy, ip conflicts, and how to do it right.
my site costs zero to stay up
my site costs zero dollars to stay up. no server, no vps, no hosting bill. just cloudflare pages, workers, kv and git.
almost all browsers are chromium and thats a problem
chrome, edge, opera, brave, vivaldi... they all use the same base. only firefox is still resisting and that scares me more than it seems.
texas sues meta and whatsapp
texas sued meta claiming whatsapp can read messages even with end-to-end encryption. we already suspected it, now there's an actual lawsuit.
isp didnt know what cgnat is
tried asking for public ip to game on parsec, support had no idea what cgnat was. gave up and fixed it with zerotier in 5 min.
sms auth is just inconvenience in disguise
sites think everyone has a phone glued to their hand 24/7. auth that only works on mobile is just inconvenience disguised as security.
yellowkey bypasses bitlocker with a usb drive and a folder
the YellowKey vulnerability lets anyone bypass BitLocker through WinRE using a FsTx folder on a usb stick. understand the risk and how to protect yourself.
vpns and captcha hell
using a vpn became torture. every click is a new captcha. lets talk about methods people are using to survive this without losing their mind.
im tired of todays internet
everything feels fake, everyone sells courses, instagram is depressing and im tired of all of it.
webp is not the villain, the apps are
everyone hates webp but it just wanted to be loved. the format is technically superior, the problem is paint, old photoshop and half the software still wont open it.
the youtube embed is spying on ur visitors and u dont even know
the default youtube embed drops 4 tracking cookies on ur visitor before they even click play. heres how to fix it with one line of code.
its over for devs
the dev job market was already saturated and now the vibe coding crowd showed up without knowing what a hello world is.
i have a whole cloud just for my sites comments
i built my own comment system from scratch using cloudflare pages functions and kv. its serverless, uses no database, and even has a python script injecting html into articles.
i hate doing design for phones
im tired of having to design for phone screens (╥﹏╥)
anbima c-pro cert is not worth it, heres my story
i studied for the anbima c-pro certification, spent money on exams and recertification, and it opened zero doors in finance. real story.
why i left finance
today im gonna talk about something that still makes me mad when i remember. the investment market is a jungle and no one says it out loud.
percentages without that rule of three thing
how to calculate percentages in your head without rule of three.
mobile mmorpgs suck nowadays
rant about generic mobile mmorpgs these days. lack of creativity, auto play, boring skills. missing old pc mmorpgs like holy beast online.
i just wanted a cheap kobo
i just wanted a cheap kobo, man. (；一_一)
i found out the city outsourced my civil service position
if u study for civil service exams, u know that seeing ur name at the top of the ranking is one of the best feelings in the world. recently i got approved in 1st place...
i asked about timezones and ended up in biopiracy
theres something weird on brazils map. the country has four timezones. i thought about it. and fell into a rabbit hole of history, geopolitics and international plant theft.
M = C*(1+n)^t only works if u have C
saw a post on X saying 97% of brazilians dont know what the compound interest formula means, and concluding: thats why we are a poor country.
does ai work just like ur brain?
is intelligence just pattern recognition and probabilities? if so, does ai and the human brain work the same way? and what about free will?
bugs in the prediction engine? depression, autism and adhd
if the brain is a bayesian prediction engine, what happens when that engine has bugs? depression, autism and adhd can be understood exactly that way.
what if were code? the simulation theory
theres a question that keeps haunting ur head after u accept that the human brain and ai work by the same principles. what if we arent at the top of the hierarchy?
mayinab: how i built a complete study app (architecture, security, privacy and the bugs that almost killed me)
in 2022 i was studying for a public exam. i needed a way to keep notes, create flashcards and review content, but without opening ten different tabs.
google translate wont make u fluent in german
vibe coder who sends a prompt and accepts what comes out is in the same situation as someone using google translate: made it work, but doesnt know the language.
icloud is not a safe!! what a high-profile arrest teaches us about privacy
an icloud backup became a map of a billion-dollar scheme. icloud wasnt hacked: it worked exactly as designed. heres what u need to know.
the quantum apocalypse and the sndl tactic
quantum computers, store now decrypt later, submarine cable tapping by intelligence agencies, and why aes-256 still protects u.
fixing sacani: 5g cant do remote surgery from japan to brazil
i saw a video from the isp Unifique asking Serjão Foguetes about how 5g would change humanity. sergio got this one wrong.
turbo backup with rclone + backblaze b2 + cloudflare (free egress!)
how to setup rclone with backblaze b2 and cloudflare for backup with no daily limit, 500 ops per second, and free download.
nobara beats windows 11 for gaming (and coding)
why nobara linux is better than windows 11 for gaming. nvidia drivers auto-install, steam, proton-ge, codecs ready. and its better for coding too.
installing windows 11 in a vm without tpm and secure boot
how to bypass tpm 2.0 and secure boot requirements on gnome boxes using labconfig registry keys. official microsoft method for virtualized environments.
installing nvidia drivers on fedora is super easy and i can prove it
how to install proprietary nvidia drivers on fedora using rpm fusion and akmod-nvidia. the driver rebuilds itself on every kernel update automatically.
running japanese games with japanese fonts on linux (lutris + wine)
how to run japanese windows games on linux with lutris. configure LANG=ja_JP.UTF-8, install CJK fonts, fix black screen with winetricks.
checking old ssd health and formatting on linux
how to check an ssd health with smartmontools, use blkdiscard for secure wipe, create gpt partition with fdisk and format to ext4.
now playing widget with lanyard: brazilian DNS almost ruined everything
the site had world.execute(me); Mili hardcoded in the music widget. literally hardcoded. always that song, no matter what i was actually listening to.
white screen on expo web. the whole bundle died before running
happy valentines day. i spent it fighting a white screen.
flutter 3.38 broke my app bc of LaTeX (733 errors per frame!)
opened my app on the tips & tricks topic and the terminal exloded. like, 733 errors per frame. the app became unusable, freezing, everything broken.
SSE-C on S3 is dying (and the security theater)
got an email from aws that almost gave me a heart attack... SSE-C is being disabled by default in april 2026.
how the heck is a chip made (and why taiwan is the main character)
how euv photolithography works, why tsmc in taiwan makes 90% of the worlds advanced chips, and the role of asml, usa and china.
mayinab froze randomly when navigating subtopics (7 tries to find it)
this was the most stubborn bug ive ever faced in mayinab. when navigating fast between subjects and subtopics, the app froze permanently. wasnt lag. was a full freeze.
is ai a bubble?
my take on ai being a speculative bubble. the tech is revolutionary but investor fomo and ai slop are creating an expectations bubble.
digital raid in brasilia, cellebrite, and my personal toolset
what is cellebrite ufed and premium, how faraday cages work, why biometrics are insecure, cold boot attacks, and crypto-shredding with aes-256.
windows 11 local account without microsoft (oobe bypassnro is dead)
the old oobe bypassnro method was disabled by microsoft. heres the current working method using shift+f10 and start ms-cxh:localonly.
the first thing i do when i install windows 11
how to remove bloatware from windows 11 with the win11debloat script. disables telemetry, copilot, widgets, bing search and removes unwanted apps.
the factory secret: bauducco and visconti are the same company
how big companies use different brands for price segmentation. bauducco, visconti and tommy are all pandurata. same factory, different prices.
how to build ur own cloud computer with hostinger + nomachine
complete tutorial to create a cloud computer. hostinger vps with ubuntu + xfce + nomachine using nx protocol. low latency, 1gbps+, remote access.
im in love with cloud
i prefer using cloud for everything. a rant about digital minimalism, latency and why i hate bulky stuff.
dumping and cash burn. why impossible prices exist
was thinking about how some companies manage to charge prices that mathematically dont make sense. like, how could a delivery or an app ride cost cents a few years ago?
my predictions for the future of the world (geopolitics)
this is just my gut feeling and personal analysis. im not a politics analyst and i dont pretend to be. read with ur brain turned on!
benford's law. how tax offices catch ppl faking invoices
how the tax office uses math to catch ppl faking invoices...? (°ロ°)
responsive design is a nightmare (and how i fixed it in quartz/obsidian)
anyone who visits my site from pc (ultrawide monitor, linux, terminal open) sees everything beautiful. quartz v4 does an amazing job generating the static site straight from my obsidian vault.