Fix Lost or Empty Menu on Okular, Thunderbird and Krita – sudo apt-get purge indicator-appmenu

Lost your menubar? Global menu applet might disable the menu inside the app, but not show it at the top of your screen either.

Fix: Just remove ‘indicator-appmenu’ package, log out and in.

Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , , | Leave a comment

Turn a Web Page into Android App – Sell on Google Play

You can sell your web page as an app on Google Play.

This brief tutorial concentrates on the hard parts. I list the command to generate the keys, and include a ready made config.xml. You can just publish your app.

How old are you, as a dog? DogAge is an Android App built with these instructions.


Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , , , , , , , | Leave a comment

Aikataulu – Palvelinten hallinta ict4tn022 3003-ti ja 3001-to – loppukevät 2019

Just write what you want (idempotency). Control almost everything with one system (single source of truth). In plain text (infrastructure as code, versionable).

Control 10 computers. Or 100. Or 1000. Or control 2071 computers, like Jussi did on a previous course (photo). Or handle 7 different operating systems and OS versions with a single master, like Matias. Course is in Finnish.

Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , , , , , , , , , , | Leave a comment

Monialaprojekti Infra pro4tn004-3003 – kevät 2019 – 10 op – ja pro4tf023-3001

English: Create your own project. You can take a company as client and work with students with different backgrounds if you want. Course in Finnish.

Latest course feedback was very good, 4.3 out of 5.

Tatu sent LoRa messages trough 8 floors with minimal power and built a weatherproof sensor.

Jussi, Eino and Saku automated setup for rsyslogd-ELK log analysis and dashbording.

Kirik and group recognized faces with OpenCV and machine learning. And we also had antivirus bypass, movement detection camera for Servula, login with OpenCV face recognition and open source identity management solution.

Continue reading

Posted in Uncategorized | 3 Comments

Aikataulu – Linux palvelimet ict4tn021-3004 ti – alkukevät 2019 – 5 op

English: Learn to manage your own Linux server – in 8 weeks. Beginners welcome. Student feedback excellent 4.7 out of 5. Course is in Finnish.

Aloita nollasta. Opiskele 8 viikkoa ja hallitset omaa Linux-palvelinta.
Opintojakson suoritettuaan opiskelija:

  • Osaa hallita Linuxia palvelimena
  • Osaa tehdä tärkeimmät asetukset tärkeimmille palvelimille (Apache, OpenSSH)
  • Osaa asentaa www-ohjelmointiin sopivan alustan
  • Osaa tehdä itselleen uusia asetuksia palvelinohjelmistoihin ohjeiden avulla
  • Tietää esimerkkejä palvelintilan tarjoajista ja hinnoista sekä fyysisten palvelinten vastaavista ominaisuuksista

Continue reading

Posted in Uncategorized | 24 Comments

DigiStartUp dig4tn024-3001 – Spring 2019 day and evening – 10 op

Innovate a new product, make it, sell it.

Last time Granpa Fishing cell phone app got 1400+ downloads, Cuberich got 1000+, FlappyDuck3D got some,  rock band the Stoats sold some fan gear, a teahouse and an accounting firm got new homepages, and sold handmade Finnish design. The guys who started much earlier are now running a company that got Nintendo Switch distribution agreement.


Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , | 1 Comment

Elisa’s Code in Salt

My student Elisa Parolo made an improvement to Salt Stack. Her pull request is now merged, and the code is part of the official Salt codebase.

Many projects are happy to accept small fixes to get more developers join development.

Continue reading

Posted in Uncategorized | Leave a comment

1000+ Papas Fishing, Finnish Design, Fan Gear for a Rock Band – DigiStartUp Finished

Innovate a new product, make it, sell it. And students delivered, in 16 short weeks.

Granpa Fishing (0.99 USD) cell phone app got 1400+ downloads, including free beta downloads.

Fan of rock band The Stoats? You can now show your colors with fan gear, the Stouts bag (10 EUR). offers handmade Finnish design, such as knit caps.

I created and teach DigiStartUp together with Teemu Ruohonen.


Continue reading

Posted in Uncategorized | Tagged , , , , , , | Leave a comment

LoRa Trough 8 Floors – Using 100 mA

My student Tatu Erkinjuntti sent LoRa radio transmissions. His device can send messages trough eight concrete floors with minimal power consumption.

He is using ESP32 with an external LoRa module, programmed with Arduino IDE. Power consumption during transmission is just 100 mA at 7.5 V. By using deep sleep between transmissions, Tatu can use even less power. He is also making a water resistant enclosure and testing batteries for use in sub-zero temperatures.
Photo courtesy of Tatu Erkinjuntti, LoRa Tocsin project.

Posted in Uncategorized | Tagged , , , , , , , , , , , , , , , , | Leave a comment

Military Cyber Department Visit & Challenge w48 Thu

Military Cyber Department visits my course. First, there will be a lecture on the cyber department and how to join it. After that, selected students can try their skills in the Cyber Challenge. The event is in Finnish, and aimed for Haaga-Helia students and faculty.

w48 Thu 2018-11-29 09:15 in pa5004, Haaga-Helia Pasila, Helsinki

Posted in Uncategorized | Tagged , , , , , , , , , | Leave a comment