Joseph Zikusooka (ZIK)

Linux Systems Engineer specializing in open source software technologies | Very experienced in building and configuring UNIX/Linux systems and servers. Passionate about developing software applications and hardware for the smart home | Currently serving as technologist at Jambula Labs and the project leader at JambulaTV, a smart home automation and entertainment platform - https://jambulatv.com | This blog focuses on the following areas: Linux How-Tos and Tutorials ::: IT Security News ::: Free and Libre Open Source Software ::: Smart Home Software ::: Digital Innovations in East Africa https://mastodon.social/@jzik | https://github.com/zikusooka

Author : Joseph Zikusooka

I am a software engineer and developer specializing in open source software. I have a solid experience building and configuring UNIX/Linux systems and servers. I am passionate about developing software applications and hardware for the smart home I am currently serving as the CEO of Jambula Labs and the project leader at JambulaTV, a smart home automation

Easily Toggle Audio Between Multiple Streams with My Updated PipeWire based Tool

I have updated a tool that I find very useful, especially when watching or listening to multiple streams at the same time. For example, I often have Live TV, podcasts, or music playing on my Linux PC. Sometimes, I want to quickly switch which stream I hear without stopping the others.

With this tool, you too can now easily cycle through all your active media apps (like VLC, MPV, or FFPLAY) and mute or unmute them so that only one is audible at a time. The other streams keep playing in the background, but you wonโ€™t hear them until you toggle to them.

This is perfect for following several live TV channels during news hour or switching between music and podcasts without missing anything.

If you use GNOME, you can even set a keyboard shortcut to make switching super fast!

Iโ€™m still working on improving this tool, so if you have any suggestions or find any bugs, please let me know. You can check out the project and download it from my GitHub repository.

https://github.com/zikusooka/toggle-pw-volumes

Enjoy, and happy streaming!

Buildroot and GCC 15: Fixes for m4 and Other Packages

This week, I tried using Buildroot on my new Fedora 42 system, which comes with GCC 15. Right away, the build failed when compiling the package host-m4.

After looking into it, I found that GCC 15 has stricter rules that cause some Buildroot packages to break-not just m4, but also others like gmp. This means if you are using Buildroot on a Linux system with GCC 15, you might run into similar problems.

What to do?

There are patches available to fix these issues, including one I submitted for m4. You can find them here:
https://lists.buildroot.org/pipermail/buildroot/2025-April/777274.html

Whatโ€™s next?

Hopefully, these problems will be fixed in the official Buildroot updates soon. Until then, applying these patches will help you build successfully with GCC 15.

If you use Buildroot with the latest Linux and GCC versions, keep an eye out for updates and patches like these!

Update [May 5, 2025]:

This patch has now been committed upstream to buildroot.

It will be applied as a workaround only when host gcc 15 is detected.

For more details, please check the full commit here:

https://gitlab.com/buildroot.org/buildroot/-/commit/7a07a9d155b8f601d68f07ee0ed1dc8d48907644

Releasing Jambula OS Linux – version 2025.3.0

๐Ÿš€ I have uploaded the latest image of Jambula OS Linux version 2025.3.0 (Great Seasons)! ๐Ÿ’ปโœจ
While this is mostly a maintenance release, I’ve snuck in some exciting features like:

โœ… Remote connections just got easier with Tailscale support! ๐ŸŒ
โœ… Audio calendar alerts are now possible with Radicale ๐Ÿ“…๐Ÿ””
โœ… Nginx web/proxy server support ๐Ÿ–ฅ๏ธ
โœ… Geolocation tool to help you pinpoint device location ๐Ÿ“

For more information about Jambula OS Linux, including instructions on how to download and install it, please visit:
https://github.com/zikusooka/Jambula-OS

A recap of my presentation at FOSS Backstage 2025

Hereโ€™s a summary of my presentation delivered during the FOSS Backstage 2025 conference in Berlin, Germany. For a deeper dive into the points outlined below, please refer to the official recording of my talk.

Why Are There Low Adoption Rates for Open Source Software in Africa?

  1. Lack of awareness and motivation for those who know.
  2. Prestige associated with using software from larger, well-known vendors.
  3. Vendor lock-in and aggressive marketing by proprietary companies targeting governments.
  4. Limited availability of certified and experienced FOSS/Linux professionals.
  5. Prevalence of software piracy.
  6. Fragmented or non-existent FOSS communities.

More Barriers to Adoption of Open Source Software in Africa

Infrastructure Challenges:

  1. Internet connectivity issues.
  2. Unstable and unreliable power supply.
  3. Lack of resources and funding.
  4. Systemic corruption.

Why Bother with FOSS Adoption in Africa?

  • Africa accounts for 18% of the world’s population (1.5B+), with some of the fastest-growing economies globally.
  • By 2025, 12 of the worldโ€™s 20 fastest-growing economies are projected to be in Africa.

Benefits of FOSS Adoption:

  1. Lower costs.
  2. Skilling and narrowing the digital divide.
  3. Startups and job creation.
  4. Empowerment through access to free resources.
  5. Localized innovations driving growth in key sectors.

Key and Strategic Sectors in Africa for FOSS Adoption

  1. Mining
  2. Agriculture
  3. Tourism
  4. Startups/SMEs (e.g., Banking, Film & Music Industry)
  5. Education
  6. Health
  7. Research
  8. Environment

Enablers and Implementers of Open Source Software Adoption

  1. Advocates/Evangelists: Promote FOSS use in sectors like government, health, and education.
  2. Trainers/Educators: Teach FOSS concepts (e.g., Linux).
  3. Community Leaders: Lead FOSS communities.
  4. Software Developers: Create and maintain open-source software.
  5. Vendors/Integrators: Include Linux distributors and organizations promoting FOSS.

Strategies for Stakeholders

For Advocates:

  1. Timing
  2. Focus
  3. Campaigns
  4. Showcase (e.g., trade shows)
  5. Share and evangelize

For Trainers/Educators:

  1. Localize content
  2. Contextualize teachings
  3. Port content
  4. Adapt materials
  5. Evangelize

For Community Leaders:

  1. Assess needs
  2. Partner with stakeholders
  3. Fundraise and support initiatives
  4. Host events
  5. Engage strategic sectors

For Software Developers:

  1. Solve immediate problems.
  2. Localize solutions.
  3. Enable workarounds.
  4. Use free and open licenses.
  5. Adapt bravely.

For Vendors:

  1. Provide support.
  2. Engage with local FOSS advocates and communities.
  3. Partner with startups to promote FOSS.
  4. Certify professionals.
  5. Establish local FOSS incubators.

Conclusion

I am optimistic that the next decade will see a significant increase in open source software adoption across Africa, unlocking its potential for economic growth and innovation in key sectors.

Jambula OS Linux – Version 2025.1.0 Released

I have just compiled and released a new image for Jambula OS Linux version 2025.1.0! This exciting update features a range of innovative enhancements, including:

๐ŸŒŸ Seamless integration with the latest Home Assistant smart home software

๐Ÿ“… Radicale, the lightweight and powerful CalDAV/CardDAV server for all calendaring needs

๐ŸŽต A local music server that supports audio announcements and alerts

๐Ÿ•ฐ๏ธ A talking clock feature that announces the time at hourly intervals

๐ŸŒฆ๏ธ Periodic weather updates delivered through voice alerts tailored to your location

๐Ÿ“ท MQTT-based triggers activated by motion detection from the built-in camera server

For more information about Jambula OS Linux, including instructions on how to download and install it, please visit:

https://github.com/zikusooka/Jambula-OS

Hass Core Installer, a new Home Assistant Installer and upgrade tool for Linux

I’m excited to announce that I have uploaded a new tool called HASS Core Installer. As you have guested, its a handy tool that makes it very easy to install, upgrade, and uninstall Home Assistant Core on Linux. So weather you are a beginner, intermediate, or advanced Home Assistant user, this tool is just what you need if any of the official and recommended methods are not sufficient for your use case.

I initially developed this tool for use on Jambula OS, a custom tailored Linux operating system designed for SoC devices such as the Raspberry Pi. However, you can use it on any Linux distribution such as Ubuntu, Fedora, OpenSUSE, Ubuntu, Debian etc.

HASS Core Installer also works off-line allowing for local installations and upgrades of Home Assistant in scenarios where there’s no access to the Internet.

To get started or contribute to this project, check out the HASS Core Installer repository on my Github!

Jambula OS Linux now offers support for Home Assistant

๐Ÿš€โœจ Exciting news for smart home enthusiasts! I have added support for Home Assistant Core installs & upgrades to Jambula OS (starting with version 2024.10.0) ๐ŸŽ‰

โš™๏ธ Jambula OS is a custom Linux operating system ๐Ÿง designed specifically for SoC devices like the Raspberry Pi 5

โฌ‡๏ธ You can download it here: https://github.com/zikusooka/Jambula-OS/

๐Ÿก Upgrade today and kickstart your journey to creating a private, offline smart home ๐Ÿ’กhub!

Linux, Python, Security, and Open Source Software TIPS

  • RE: https://mastodon.social/@jzik/115700513530117538Heads Up: Image updated to v2012.12.1!
  • Excited to release version 2025.12.0 of Jambula OS, a free, open source Linux OS for SBCs. Perfect for developers, enthusiasts & DIY smart home builders. If you have or you're hoping for a 5 soon, this is the image to grab!Key features:๐Ÿ”’ Robust, Private File Sharingโš™๏ธ Improved Setup & Onboarding๐Ÿ  Latest Home AssistantPlus, cool tools for my supportershttps://jambula.org#JambulaOS
  • ๐Ÿ’ก TIP: On a Linux system using bash, you can compare text strings without worrying about upper or lowercase by using the ,, (lowercase) or ^^ (uppercase) parameter expansion modifiers e.g.EDITION=CommUNITYif [[ ${EDITION,,} = community ]]; then echo "Community"fi${EDITION,,} converts the value to lowercase.@opensuse @fedora @debian #ZikTIPs #bash #scripting #linuxtips #techtips #feditips
  • Not affiliated to this, but sharing in case it's what you're looking for.https://source.network/careers/head-of-developer-relations-role#FediHire #fedigethired #fedijobs
  • RE: https://fosstodon.org/@opensuse/115526151634297376This is probably the most watched conference talk video of me ever! It's from one of my sessions presented at the OpenSUSE Conference earlier this year in Nuremberg, where I introduced Agama, the new Linux installer available in the just released @openSUSE Leap16.If you haven't yet seen it, check it out at: https://youtu.be/LXJbOy-pXMc#OpenSUSE
  • TIP: ๐Ÿ’กCheck the remaining battery level for your connected bluetooth device on a typical Linux system using the following command:bluetoothctl info AA:BB:CC:DD:00:11 | awk '/Battery Percentage:/ {print $4}' | tr -d '()'* Replace "AA:BB:CC:DD:00:11" with the MAC address of your bluetooth device@openSUSEย ย @fedora @debianย ย #ZikTIPS #Bluetooth #Audio #TechTips #SysAdmin #LinuxTips #CLI #Fedora #Debian
  • ๐Ÿ’ก On a typical Linux system, you can find bluetooth devices that are paired, connected, and trusted using the following command line:bluetoothctl devices [ Paired | Connected | Trusted ] For example: List currently paired bluetooth devices:$ bluetoothctl devices PairedDevice 00:42:XX:YY:ZZ:YY XXBK85Device 00:FD:AA:XX:YY:X8 D-26@opensuse @fedora @debian #ZikTIPS #TechTips #SysAdmin #LinuxTips #CLI #Fedora #Debian
  • So happy to see these two back together! Can't wait to catch up on season 3 of #TheDiplomat with Allison Janney and Bradley Whitford#TheDiplomatS3 #TVShows #TVSeries
  • Vibe coding – Fake it until AI breaks it.#fedihumour #vibecoding #AI #Fediverse
  • If you care about diversity in open source especially from marginalized communities like those across Africa – check out this talk I gave at the recent @opensuse Conference in Germany. I argue that the open source community can no longer afford to overlook developers in these regions. Their talent, perspectives and potential are vital to the future of open source everywhere.https://www.youtube.com/watch?v=olMcEiI8EVw#osC25 #Diversity #Africa
  • Just finished watching an excellent presentation by Dorinda Bassey on "Modernizing Virtio GPU: A Rust-Powered Approach with vhost-device-gpu" at @KernelRecipes @redhat #kr2025 #KernelRecipes #Kernel #Embedded
  • I am really enjoying the talks coming out of the @KernelRecipes conference, running now through September 24. Especially looking forward to @gregkh 's session Today on "The CRA and What It Means for Us" Check out live stream at: https://www.youtube.com/watch?v=U7pZbCnJxEw#CRA #kr2025 #kernel #Embedded
  • RE: https://mastodon.social/@jzik/115225291806144141Thanks to everyone who replied, shared, or boosted my previous post about teaching Linux remotely.I've decided to offer my own 4-person class starting October 8th! It will be remote, & offered at a small cost. The schedule is flexible & course materials will be shared shortly.If you'd like to join or learn more, check the details here:https://joseph.zikusooka.com/?page_id=2807Boosts appreciated again!#Linux #FediHire #FediHired #GetFediHired #FediJobs #jobs #RemoteWork #TechEducation
  • Wishing everyone attending DevConf.US a fantastic conference this weekend! Unfortunately, I won't be able to join you or give my previously scheduled talk, but I hope you all have a great time!#DevConfUS #DevConf_US #devconfus2025
  • Would anyone know which organizations offer opportunities for teaching Linux classes online & remotely? I am interested in sharing my expertise. I currently live in the GMT+3 time zone but am flexible.I have experience teaching Intro to Linux Systems Admin & Server management. Iโ€™ve successfully trained multi-day/person classes using BBB, Jitsi & Zoom.If you know of any or need training, pls let me know.Boosts appreciated!#FediHire #FediJobs #GetFediHired #jobs #FediHired
  • I've uploaded the latest ๐‰๐š๐ฆ๐›๐ฎ๐ฅ๐š ๐Ž๐’ image – version ๐Ÿ๐ŸŽ๐Ÿ๐Ÿ“.๐Ÿ—.๐ŸŽ. This release continues the work I've been doing to make Jambula OS, a reliable, lightweight Linux platform for SoC devices like the Raspberry Pi 5. If you're building smart automation solutions on embedded platforms, this update is definitely worth checking out.Highlights in this update: Bluetooth speaker support, Kea DHCP, and much more!https://code.jambula.net/zikusooka/Jambula-OS
  • The talks from this year's Open Source Summit Europe are now available @linuxfoundationCheck out the full playlist at:https://youtube.com/playlist?list=PLbzoR-pLrL6qKwLt8A787ggMLHNivOHve#OSSummit #OSSEU
  • Hass Core Installer 2025.9.0 released! No major changes – I just updated to the latest Home Assistant release.This free and open source tool helps you install/upgrade Home Assistant via the (now deprecated) core method for those who prefer its flexibility. https://github.com/zikusooka/hass-core-installer#HomeAssistant
  • For anyone interested in using Kea DHCP server on buildroot, I have submitted a new package patch that is currently awaiting upstream review. You can check it out here: https://patchwork.ozlabs.org/project/buildroot/patch/20250903113307.100754-1-zik@jambula.net/@iscdotorg #ZikTIPS #buildroot #dhcp #networking
  • ๐Ÿ’ก Calculate the number of days since a given date (e.g. 30 June 2025) on a Linux system:echo $(( ( $(date +%s) – $(date -d "2025-06-30" +%s) ) / 86400 ))@opensuse @fedora @debian #ZikTIPs #Linuxtips #LinuxTechTips
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