Naar jaarlijkse gewoonte zet ULYSSIS op dinsdag 17 oktober haar deuren voor iedereen open. Ben je geïnteresseerd in de werking van ULYSSIS? Wil je graag weten hoe we onze servers onderhouden? Of wil je graag zelf bij ULYSSIS aan de slag? We geven je graag een woordje uitleg en bij onze leden kan je met al je vragen terecht!

Tussen 18 en 22 uur kan je onze servers bekijken en tonen we je graag wat voor onderhoud we verrichten, vertellen we hoe we bijdragen aan open source software voor studenten, kan je zelf aan de slag met een CTF challenge en nog veel meer. Voel je dus de nieuwsgierigheid knagen? Zorg dan zeker dat je er bent. Je kan ons terugvinden in Residentie Holleberg, Schapenstraat 37, Leuven.

Wilde je graag wat bijleren over onze werking maar kan je er jammer genoeg niet bij zijn? Dan kan je als alternatief ook heel wat informatie vinden op of op onze pagina “Hoe is het om een ULYSSIS medewerker te zijn?“.


Workshop LaTeX

Dit jaar geven we traditiegewijs weer enkele workshops over LaTeX. LaTeX is een document opmaaktaal die het eenvoudig maakt om gestructureerde teksten op te stellen met een uniforme look. Tijdens de workshop zal er gefocust worden op kennis die handig kan zijn bij papers zoals de bachelorproef en masterthesis.

We organiseren twee Nederlandstalige edities, telkens om 20u. Deze gaan door op donderdag 12 oktober en maandag 23 oktober in Celestijnenlaan 200H (Quadrivium), lokaal 03.140 / 00.100 op campus Arenberg. Er wordt er ook een workshop geven in het Engels op donderdag 26 oktober in Andreas Vesaliusstraat 13, Groep T module 6.

Gelieve je LaTeX op voorhand te installeren en te configureren. We hebben immers niet voldoende tijd om 50 installaties te begeleiden. Instructies kan je vinden op onze inschrijfwebsite:


Documenten Eerste Online Workshop LaTeX – Oktober 2020

In onze allereeste Online Workshop LaTeX van 22 oktober 2020 hebben we de basisprincipes van LaTeX uitgelegd.
Zoals gebruikelijk publiceren wij onze workshopdocumenten en installatiehandleiding als naslagwerk.
Als je vragen hebt, aarzel dan niet om ons op een e-mail te sturen.

An open source and privacy respecting alternative for online contact and group collaboration

Dit artikel is ook beschikbaar in het Nederlands voor studenten en personeelsleden die Engels minder goed beheersen. Je kan die versie hier vinden.

At ULYSSIS we think ethical software is very important. We don’t just try to encourage the use of open source software, but also strive to ensure that all software respects users’ privacy and that it’s available to all users. As a consequence of the measures taken against COVID-19, all kinds of software are now being used to help with presentations, lectures, discussions and collaboration, both for working from home and for online classes at universities and colleges. As an IT organisation, we naturally welcome this innovation. At the same time, we are also slightly concerned about the consequences of choosing certain software solutions.

The KU Leuven and some other educational institutions have opted for Skype for Business. We understand, of course, that KU Leuven prefers to use closed-source solutions from Microsoft they already license (even though we regret that decision). However, there are unfortunately some issues of availability with Skype for Business. We heard from many students that there is no Linux version of Skype for Business available and that the version for macOS crashes quite frequently. In addition, a number of students also mentioned audio and video lag which of course makes conversations less smooth. Many professors and assistants therefore switched to Zoom.

Zoom is available for Windows, macOS and Linux, which we think is very important. Unfortunately, more and more problems have recently come to light. In addition to the fact that Zoom’s privacy policy is worded in a very strange way when it comes to whether or not they sell your personal data, an investigation by Vice recently discovered that Zoom’s iOS app sends personal information to Facebook (even if you don’t have a Facebook account). In two articles, describes how Zoom not only has major security problems that allow people unwanted access to the webcam, but also that it spies on all participants in a conversation and reports to the organiser of the meeting which window the participants are currently viewing. Input Magazine also discussed the disturbing situation surrounding Zoom. The situation surrounding Zoom is so far-reaching that Leiden University has even banned its use completely.

The homepage of

We are however not only here to highlight problems, but also to offer solutions. Fortunately, there is a nice open source alternative that is freely available to students, staff and companies. is full open source video conferencing software with both the option to use their online version on or to host your own instance. Not only is all code publicly available, so everyone is free to do what they want with it and test security and respect for privacy, but Jitsi’s development is also supported by universities, charities such as NLnet, and companies that develop paid services based on Jitsi (such as the owners of the software, 8×8). As a result, everyone is able to use for free.

We therefore advise all professors, assistants and students to opt for Jitsi so that everyone, regardless of their operating system and with respect for privacy, can follow classes, practicals and group projects. Not only does it work on Windows, Linux and macOS, but Jitsi also has an app for Android and iOS. Do you for some reason prefer not to use or do they have a temporary outage? Then both we and Belnet offer alternative instances of Jitsi. Our instance is available on and has the added bonus that meetings can only be started after logging in with a Central KU Leuven Login, after that everyone is free to enter. Belnet’s instance is available on

The ULYSSIS members meeting using

We have done a lot of tests with Jitsi over the past period and are very satisfied. We’ve held all our members meetings with Jitsi, but we also use it to amuse ourselves and to keep in touch with our other friends. Jitsi also has a lot of useful features that not everyone knows about. For example, at the bottom left you’ll find a button to share your screen, which isn’t just limited to sharing your entire view but also a specific application. There’s also a handy button to indicate that you want to say something, which is very useful for questions during class or during meetings. Finally, there is a button on the left for the chat function to share information such as links. At the bottom right there is first of all a button to display speakers as tiles. This functionality is extremely useful for situations such as meetings where speakers are often following one after the other and sometimes even speaking at the same time. With the info button next to it, you can easily copy the link of the conversation or set a password. Finally, there is a lot of extra functionality hidden in the menu. The moderator who created the room can mute everyone’s microphone. You can also adjust the video quality if you are experiencing connectivity issues. On specifically, there’s also the extra options to record your call or to stream it through an external service. We’re convinced that Jitsi has all the functionality to help students and staff in this difficult situation, and we can’t encourage anyone hard enough to use it instead of Skype for Business, Zoom or other closed tools.

Are you more interested in our technical experiences with Jitsi? Then keep an eye on our technical blog at!


Workshop Mailinglijst

Blijf op de hoogte van onze workshops door je in te schrijven op onze mailinglijst.


We are happy to announce this year's edition of the Open Source Job Fair taking place in 3 weeks, on Wednesday 06 March 2024, from 16h30 to 21h in the University Halls in Leuven. More information as always on

Ook vandaag wordt nog druk gewerkt aan onze verhuis. Intussen werd onze airco verplaatst en werden de laatste diensten online gebracht. Nu enkel nog opruimen en dan kunnen we genieten van onze lesvrije week!

Intussen zijn alle websites die we hosten weer online! Ook heel wat andere diensten zoals onze shellservers, IRC en GitLab zijn weer beschikbaar. Alle email die vandaag moest afgeleverd worden loopt ook stilletjes aan binnen.


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