(ceska verse dole)

LACs are important. When your phone crosses a LAC boundary (an area), it reports to the operator so they know roughly where to find it. On GSM, you can even hear it if the phone is near a speaker. The communication happens with a cell tower — and there are quite a few in the area (dozens) — so you can be fairly sure the operator keeps records, and kind of “forever.” What’s worse, the network is built on something called SS7, and your security wasn’t really a priority there. So effectively, any operator could probably track you fairly cheaply. And when I say any operator, I mean basically anyone who can make a deal with an operator.

Areas are also important for battery consumption. If the operator has misconfigured the network, or if you’re unlucky and your living room ends up in a different area than your kitchen, you’ll notice it in battery use.

Yeah, if someone really wanted to spy on you and was willing to invest more than a few pennies, they have lots of ways to figure out which cell you’re in. Silent SMS, for example.

You can view network information using an app like SatStat. So, do you know which LAC you live in?

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LACy jsou dulezite. Kdyz se Vas telefon presune pres hranici LACu (oblast), tak se ozve operatorovi, aby vedel, kde ho ma hledat. Na GSM je to hezky slyset, kdyz je telefon pobliz reproduktoru. Komunikace probiha s nejakou bunkou, tech je v oblasti docela hodne (desitky), a muzete si byt celkem jisti, ze si operator vede zaznamy a to tak nejak na veky. Co je horsi, sit je postavena na cemsi jmenem SS7, a na (Vasi) bezpecnost se tam prilis nemyslelo. Takze efektivne vas nejspis muze sledovat libovolny operator a to velmi levne. A kdyz rikam libovolny operator, no, myslim tim v zasade kazdy kdo se s nejakym operatorem dohodne.

Oblasti jsou dulezite i pro spotrebu. Pokud bude mit operator spatne nakonfigurovanou sit, nebo budete mit treba smulu a obyvak spadne do jine oblasti nez kuchyne, poznate to na spotrebe.

Jo, kdyz Vas nekdo bude chtit opravdu spehovat, a bude ochoten investovat vic nez nejake halere, ma spoustu moznosti jak zjistit, ve ktere jste bunce. Tiche SMS, napriklad.

Zobrazit informace o siti muzete treba pomoci aplikace SatStat. Tak co, uz vite, v kterem bydlite LACu?

Mila mBank.cz, nebylo by dobre udelat placeni na internetu jeste otravnejsi? Jasne, opisuju cislo karty, CCV, a 6-ti mistny kod. To by se +/- dalo pochopit. Ale proc mam opisovat nesmyslny text ktery mi serviruje Vase nedomyslena brana? Nejaky cosi cosi vrabec brsfkof? Urcite sezenete nekoho, kdo Vam vysvetli, jak udelat mene otravne zabezpeceny web.

Or is that just artefact of MLS-full-cell-export-final.csv.gz? There's more strangeness in there...

GSM cell towers are grouped into LAC areas. And... it seems those LAC numbers in Czechia have patterns in them -- way too many are divisible by 100 -- and they are actually consistent across 3 major operators. LAC 28752 is around Třinec, for example, in all three.

If someone knows more, tell me, there may be more patterns I missed.

https://www.youtube.com/watch?v=Ex-ibI2MWIg No kings!

Septa vas kun?

Kone vydavaj ruzny zvuky. Tesi me, ze je +/- systematickej prehled, treba na https://www.youtube.com/watch?v=18z1sAps6Gc .

A zlutej vydava cim dal vic zvuku. Zacal septat. A vlastne ... hodne koni okolo me zacalo septat. Ja dam bridge, a oni zabublaj. Zlutej to nedela tak casto, ale dneska byl hladovej, a viditelne chtel pracovat. Jenze ja chtel v tu chvili pohladit jinyho kone, a zlutej byl celkem nestastnej. Postavil se vedle me, do polohy jako kdyz se vede, hlava rovne, a zabublal, ale tak tise ze stat o krok dal neslysim nic. Pekne. No, jeste par sekund pauza, a te prace se dockal.

Did RedHat turn to spamming now? Noreply address, intentionally confusing body, no clear way to unsubscribe, no information why I'm getting this in the first place. Illegal according to czech law. Come on, solid companies do not behave like this.

How do you program for Android? Lets say "display me a distance to given gps coordinates"? Long time ago, there was sl4a, allowing you to run python scripts; it could do simple dialogs, but not real UI. I am aware of Termux. Is there something else? There's MicroPythonOS.com that can do gui on esp32 and linux with few lines on code (LVGL based UI), is there something similar? I could write javascript and run that in a browser, but...

Jedem... vzhledem k rocnimu obdobi docela daleko. Zlutakovi ani kobyle se 2x nechce, zlutej to rika celkem slusne, kobyla to rika o neco min slusne. Tak ve tretine nejak pochopi, ze stejne pojedem, a kolem poloviny zacnou i celkem slapat. A potom... no, oznami nam, ze tady se pred pul rokem pasli, a ze uplatnuji pravo past se tu znovu. Aha, takze jedem jeste par metru, a pak se uplne nezavisle rozhodujem, ze tady je dobry cas na svacinu, a ze kone si teda muzou kousnout.

White to move and mate in 546 moves. https://en.wikipedia.org/wiki/Solving_chess

Dear soldiers. Remember, a) congress has to start a war, not a wannabe-king, b) you may not commit a war crime, c) you must refuse illegal orders. https://www.nbcnews.com/politics/white-house/trump-weighing-several-options-us-troops-iran-rcna263909

Today I learned that blackcurrant was illegal to grow in US... and that checkers were solved.

When you see "Egon Cholakian"... it is a fraud.
Kdyz uvidite "Egon Cholakian"... budou nasledovat lzi. https://www.parlamentnizpravy.cz/ctk-publikovalo-dezinformaci-o-egonu-cholakainovi-z-tvorive-spolecnosti/

I like my main computer working, so I postponed updating distro probably for a bit too long. Now I'm at Debian 12, and most of stuff is still working (good). Funny problem is that now some of my scripting using emacs causes 100% load (less good) and I'm running out of disk space.

(Konsky) herpesvirus u Velkych Popovic. https://www.ikun.cz/#!/aktualita?itemId=6647

Penize pro armadu nejsou, protoze musime dotovat Agrofert :-(. https://www.seznamzpravy.cz/clanek/domaci-zivot-v-cesku-policie-overuje-informaci-ze-k-pozaru-v-pardubicich-se-hlasi-konkretni-skupina-302193

"If you made it this far, you are either ex-witness or soon will be". Man is funny, and has more cult (sorry, "new religious movement") content in there. https://www.youtube.com/watch?v=pIDQwhaeXBs

Pristi weekend bude Installfest ... a na nem povidani, jak udelat male hodinky nebo maly telefon -- https://www.installfest.cz/if26/program .

Rozbil jsem pozitivkou kone

Pche, reknete si, to uz se podarilo kazdymu, proto se lidi bojej krmit kone. Jenze ja rozbil ciziho... No dobra, tak to taky neni tak neobvykly. Jenze... ja s ni zadnou pozitivku nedelal!

No dobra, osoby a obsazeni: zlutak, pomerne zkuseny s pamlskama, ne-uplne sef stada, ale uz je tam dlouho. Kobyla je skolni... kobyla, primerne spokojena, pomerne zkusena pri praci tlakem, primerene bezproblemova. Vlastne ... hodne fajn kobyla.

Jak odvedete zlutaka z pastvy? Snadno. Zavolate na nej "jdem domu". To je pro show, on ani nezvedne hlavu, ale vy se otocite zady a jdete. Ostatni si odvadeji sve kone, vy proste jdete za nima, neotacite se. Pak se zacne trast zeme, uslysite funeni, staci upazit, neco vam zafuni na ruku a dotkne se, reknete "hodny" a date pamlsek... a dobry, zlutak jde sporadane za vama.

Takze odvyst dva kone obvykle neni problem, proste vedete toho druhyho, a zlutak jde za vama -- je kun a tak neni rad sam.

Obvykle je to klicove slovo. Na pastvine nekdo nechal dve prekazky, takze zlutaka trochu provokuju pamlskama, pak si davam jednu a pak obe, a on skace za mnou. Super! Jupi! ... Jo, a to je to misto kdy jsem rozbil kone.

Jenze ja mam problem. Chci projit vychodem, kobyla je ode me na dylku voditka, a rika ze ne. Co to... neco jsem rozbil. Pojd, nejdu, hmm, co to. Dala by si jeste travu? Proc... rozhlizim se, a je to jasny.

U vychodu stoji zlutak, a prace ho zrejme bavila, proto chce jeste, stoji ode me tak metr a pul, a na kobylu hazi vyraz "tohle je muj clovek, drz se od nej dal". Takze vychodem se ... jasne ... neda projit, protoze v nem prekazi zlutakova bublina, a ja mam dost rozumu abych se s kobylou nedohadoval. "Zlutaku, jdi nekam dal". "Ne Pavle, ja chci nejakou praci a hlavne ty pamlsky". Aha, tak kobylu pustim a ... ona zcela logicky odchazi. Tohle je docela velka pastvina...

No nic, zlutak pocka, kobyla nastesti odchazi ale neprcha, a ja mam moznost pochvalit zlutaka za to ze stoji na miste. No jo, mam tu skupinu o dvou konich, a hold zlutak bude muset neco malo dostavat za to, ze kobyle dovoli byt okolo me.

Zbytek cesty probiha bez problemu, nez je vypustim do jejich vybehu je krasne videt rozdil: zlutak projde brankou a zustane stat rovne. Takhle to delame, takhle to ma byt, a ma i trpelivost. Kobyla se na me otaci s pohledem "to jsem byla hodna, copak pro me mas?". Mam pro oba, byli sikovny.

Již příští sobotu na InstallFestu!

- přednáška proč přejít na Linux
- stánek s telefony
- workshop, kde si můžete vyzkoušet instalaci Linuxu na přinesený telefon

https://pretalx.installfest.cz/installfest-2026-2025/talk/73DDNB/

#Installfest #MobileLinux #Mobian #NixOS #postmarketos