Dan's haven

I am Dan Čermák a Software Engineer working on Development Tools at SUSE. Besides improving the developer experience, I'm also very passionate about testing & QA, documentation, automation and community building.

I am active in the Fedora community, where I am a package maintainer, one of the founding members of the i3 SIG and I also served in FESCo for the Fedora 34 cycle.

When I'm not sitting in front of the computer, I enjoy baking and cooking and a nice bike ride or a workout.

What value can a Linux Distribution (Vendor) provide in the Container and Kubernetes age

• My last talk of 2024 was at the SUSE Open House about building openSUSE. There is no recording, but you can find the slides on dcermak.github.io/building-opensuse
• I helped out at the openSUSE project's booth at LinuxDays.cz 2024 and gave a lightning talk about the RPM Spec Language Server (again, this time a longer version). The slides can be found online on dcermak.github.io/rpm-spec-language-server-presentation and the recording is on the LinuxDays.cz YouTube channel.
• I visited the openSUSE Conference 2024 and gave a lightning talk about the RPM Spec Language Server (you can find the recording on the openSUSE project's YouTube channel)
• I was at DevConf.cz 2024 with the openSUSE project at the booth and gave a lightning talk about the RPM Spec Language Server (find the recording on the DevConf YouTube channel)

• The openSUSE project was present at the Chemnitzer Linux Tage 2024 with a booth and Tuxedo Computers interviewed me during the event about the openSUSE project, you can find the recording on the Tuxedo Computers YouTube Channel (the interview is in German but there's a transcript in English).

  I also gave the talk "(Fast) alles was man an der Uni nicht lernt" ("(Nearly) everything that they didn't teach you at university" in English). The recording is on media.ccc.de and the slides can be viewed online: dcermak.github.io/everything-you-didnt-learn-at-uni.

• I had the pleasure to present two talks at FOSDEM 2024:

  "The Monolith versuse The Swarm" - the slides are on GitHub and the recording is on the recording is on the FOSDEM video page.

  "Testing Containers with Python and pytest" - the slides can be found on GitHub on dcermak.github.io/pytest_container-presentation and the recording is on the FOSDEM video server.

• I gave two talks at DevConf.cz 2023: "All the Things they didn't teach you at University" (slides are on GitHub dcermak.github.io/everything-you-didnt-learn-at-uni and the recording is on YouTube) and "Testing Container Images with Python and Pytest" (slides are on GitHub dcermak.github.io/pytest_container-presentation and the recording is on YouTube)
• "Everything that you never wanted to know about building containers in OBS" at the openSUSE Conference 2023, the recording is on the openSUSE YouTube channel and the slides can be found on dcermak.github.io/building-containers-in-obs. The "Testing and Delivery of the Base Container Images" was held at the openSUSE Conference 2023 too, you can find the slides on dcermak.github.io/testing_and_delivery_bci and the recording on YouTube.
• "Testing and Delivery of the Base Container Images" held at DevConf.cz Mini 2023 (the slides can be found on dcermak.github.io/devconf.cz_mini_2023/) and took part in the panel discussion "OpenSource as a venue for education" (the recording can be found on YouTube).
• Testing Container Images with Python and Pytest at the Container Plumbing Days 2023. The presentation recording is on YouTube and the slides can be found on dcermak.github.io/pytest_container-presentation.
• Besseren Code Schreiben at the Herbstcampus 2022. The slides can be found on d4n.gitlab.io/Herbstcampus2022.
• Getting Home Assistant up and running on Fedora IoT and a Raspberry Pi held at Nest 2022. The slides are on d4n.gitlab.io/nest2022/ and the recording is on YouTube.
• Lightning Talk: What Made Your Container Fat? Visualizing the Size of Container Layers at KubeCon + CloudNativeCon Europe 2022. You can find the recording on the CNCF YouTube channel and the slides on sched.com.
• Barrieren zum Mitwirken in Open-Source-Projekten einreißen at the Chemnitzer Linux Tage 2022 (held in German), the slides can be found on d4n.gitlab.io/clt_2022 and the recording is available for download from the CLT homepage
• Tearing down Barriers for Contributions by Non-coders and Newcomers at FOSDEM 2022, slides are can be found on dcermak.github.io/fosdem_2022 and the recording is on YouTube
• "What made your container fat?" Held at FOSDEM 2022 and DevConf.cz 2022, the slides are available on dcermak.github.io/container-layer-sizes-presentation and the recordings are on YouTube. This is a lightning talk presenting my container layer size visualizer that you can find on GitHub: github.com/dcermak/container-layer-sizes
• Using openQA to test Linux distros and Appliances at DevConf.cz 2022, please find the recording on DevConf's YouTube Channel and the slides on dcermak.github.io/devconf.cz_2022
• Building a Language Server for Salt States at the openSUSE Conference 2021, the recording is available on the openSUSE YouTube channel, the slides can be found on github.com/dcermak/osvc21 and the presented language server for Salt States is on github.com/dcermak/salt-lsp
• Testing Visual Studio Code extensions at FOSDEM 2021, the recording is accessible via the FOSDEM homepage and the slides are on github.com/dcermak/fosdem_2021
• openQA - end to end testing of operating systems and Testing extensions for Visual Studio Code both held at DevConf.cz 2021. The slides for both talks can be found on github.com/dcermak/devconf.cz_2021 and the recordings are on DevConf's YouTube channel: openQA and Testing VSCode Extensions
• Building a Visual Studio Code extension for the Open Build Service held during the openSUSE Virtual Conference 2020

• dcermak & D4N
• D4N
• Dan Čermák
• Dan Čermák
• @DefolosDC
• @Defolos@mastodon.social
• defolosdc
• defolosdc
• defolos.bsky.social

The source code of this home page is on hosted gitlab.com/D4N/dancermak.name

You can reach me on Mastodon or on Matrix (@defolos:matrix.org).