Gabi hat Matthias mit 13 Fragen rund um den Tretroller für Erwachsene überrascht – Teil 1


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Gabi hat sich 13 Fragen ausgedacht und Matthias damit bei einer Tretroller-Touren überrascht.

Folgende Fragen hat Gabi gestellt:
1. Weißt du noch, wie du das erste Mal auf einem Tretroller standest und wie sich das angefühlt hat?
2. Was hat dich dazu gebracht, aus dem Tretroller mehr als nur ein Hobby zu machen?
3. Was unterscheidet einen guten Tretroller von einem aus der Einsteigerklasse?
4. Viele Denken beim Tretroller an Kinderspielzeug. Was entgegnest du diesen Menschen?
5. Welche gesundheitlichen Vorteile hat das Tretrollerfahren aus deiner Sicht - gerade auch für Menschen über 40 oder 50?
6. Welche Fehler siehst du bei Anfänger:innen am häufigsten und wie lassen sie sich vermeiden?
7. Kann man den Tretroller realistisch in den Alltag integrieren - Pendeln, Einkaufen, Freizeit - oder bleibt es eher ein Sportgerät?
8. Welchen Vorteil hat der Tretroller in Kombination mit einem Hund?
9. Welche Art von Mensch kommen zu uns in den Laden?
10. Ist Tretrollerfahren anstrengend?
11. Kann man die ganze Zeit auf dem Tretroller stehen?
12. Warum sollte jeder einmal einen Tretroller ausprobieren?
13. Wie stellst du dir die Tretroller-Zukunft in 5 Jahren vor? Was wünscht du dir für die TretrollerLiebe/Tretrollerszene?

🔗 Zur TretrollerLiebe TretrollerLiebe.de

🧑‍🤝‍🧑 Wir sind: Gabi & Matthias Wir leben mit Leidenschaft ein aktives Leben voller Bewegung, Neugier und Freude. Unser Ziel ist es, euch zu motivieren, dass es nie zu spät ist, den Körper und Geist in Schwung zu halten. Begleitet uns auf unserer Reise, inspiriert zu bleiben und jeden Tag aktiv zu gestalten. Bleibe fit, bleibe neugierig, bleibe gesund.

This entry was edited (today, 11:56 AM)
in reply to Deep

I'm feeling pretty justified in sticking with Wacom. I only replaced my first tablet because it had a 4:3 aspect ratio and a serial port. (I could've lived with the latter, but the aspect ratio was making things skewed on a modern display.)
This entry was edited (today, 5:55 PM)

need help for powersaving a software raid


Hello there
I want to reduce the consumption of my server and so, to reduce access to hard drives

But I suspect mdadm to access the drives frequently and wake them up.

Because even when the drives are not mounted, they wake up frequently and I can't find the reason.

Because the are not mounted, it's not due to a process.

I've temporarily disabled smartd so it's not that.

remains the software raid, who can potentially do regular checks, if that's the case how to fix it?
?

ps: I know spin down/up isn't good

in reply to Salcie

You can try and figure out what's accessing the array:

fatrace | grep /mnt/mountpoint/

This will show you the process, type of access (read, write, open, etc), and path. If you don't see anything right away just leave it running for a bit.

This entry was edited (today, 1:30 PM)

Fedora/KDE keyboard woes


Hello people,

I have been experiencing some trouble with my keyboard lately since moving from Windows to Linux and have yet to find a proper solution. I'm running Fedora 44 (KDE Plasma Desktop), specifically:

Operating System: Fedora Linux 44
KDE Plasma Version: 6.7.1
KDE Frameworks Version: 6.27.0
Qt Version: 6.11.1
Kernel Version: 7.0.13-200.fc44.x86_64 (64-bit)
Graphics Platform: Wayland

The keyboard is a NuPhy Halo75 (ANSI-US layout). It has a toggle to switch between Windows and Mac mode/layout and media keys on the function row; I want the function keys to be function keys by default and media keys when pressing Fn. On Windows, I was using the "US International" layout (primarily for Ä/Ö/Ü on Alt+Q/Y/P and € on Alt+5).

Now, sadly, on Linux, with the keyboard toggle set to Windows and either the "English (US, intl., with dead keys)" or "English (US, intl., AltGr. Unicode combining)" layout enabled, I can type my precious umlauts etc. perfectly fine, but the function keys always act like media keys, no matter what else I press, and I have not found any way to change that behavior. With the toggle set to Mac, the function keys work fine (as do the media keys with Fn), but I can no longer type umlauts (and what even am I without my umlauts). I enabled the "Alt is swapped with Win" keyboard option, since those are swapped on the Mac layout. From the keyboard preview, the key presses seem to be mapped correctly (left and right alt show up as "Meta L/Alt L" and "Meta R/Alt R", respectively, the Windows key shows up as "Super L").

I'm probably just missing some option or something, but I've looked everywhere I could think of (and, considering I am quite new to Linux/KDE, that isn't too many places) without luck. My web searches didn't really turn up anything useful either. So, if anyone has an idea or knows where to look and what to change, that would be highly appreciated! I hope my description of what I'm looking for is understandable.

I apologize for the somewhat long-ish post, but if you read this far, thank you 😀

in reply to ascend

I have the original Halo75 (not the V2) which sadly doesn't support QMK/VIA yet. I remember there was some dedicated app to configure the keyboard (NuPhy Console maybe?) but I don't know if it's worth trying to get that to work on Linux and that seems to be basically abandoned/obsolete

Evaluating Investment Risks in Continuous Pyrolysis Projects


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Continuous pyrolysis has gained increasing attention as an industrial solution for converting waste materials and biomass into valuable products such as pyrolysis oil, biochar, syngas, and recovered carbon materials. Compared with batch systems, continuous facilities offer higher throughput, greater automation, and improved production consistency. However, these advantages are accompanied by higher capital requirements and greater operational complexity.

A successful investment depends on evaluating risks across technical, financial, regulatory, and commercial dimensions rather than focusing solely on equipment specifications. Thorough due diligence helps investors identify potential challenges before significant capital is committed.

Assessing Feedstock Supply Risk

Long-Term Availability


Continuous pyrolysis plant requires a stable and uninterrupted supply of feedstock to achieve economic efficiency. Production interruptions caused by insufficient raw material can significantly reduce equipment utilization and increase operating costs.

Investors should evaluate:

  • Annual feedstock availability
  • Seasonal supply fluctuations
  • Supplier reliability
  • Transportation logistics
  • Future market competition for biomass or waste materials

Securing multiple supply sources can improve operational resilience.

Feedstock Quality Consistency


Variations in moisture content, particle size, contamination, or chemical composition directly affect process stability and product quality.

A comprehensive feedstock assessment should include laboratory testing and long-term sampling to determine whether material characteristics remain consistent throughout the year.

Evaluating Technology Reliability

Commercial Operating Experience


Different to small pyrolysis machine Continuous pyrolysis systems involve sophisticated thermal management, automated feeding, gas handling, and product recovery technologies. Investors should prioritize equipment that has demonstrated reliable performance under commercial operating conditions rather than relying solely on pilot-scale results.

Key evaluation factors include:

  • Proven industrial references
  • Equipment operating history
  • Continuous runtime records
  • Maintenance requirements
  • Availability of technical support

Technology with verified operational performance generally presents lower investment risk.

Process Stability


Stable reactor temperature, feed rate, and gas flow are essential for continuous production.

Equipment featuring advanced automation and intelligent process control typically delivers more consistent production while reducing operational uncertainty.

Understanding Capital Investment Requirements

Initial Project Cost


Continuous facilities generally require substantially greater capital investment than batch systems due to higher automation levels and more sophisticated auxiliary equipment.

Major investment categories include:

  • Process equipment
  • Civil construction
  • Utility infrastructure
  • Environmental protection systems
  • Installation and commissioning
  • Engineering services

Developing a realistic capital budget helps prevent financing shortfalls during project execution.

Contingency Planning


Unexpected expenses commonly arise during construction.

Allocating contingency funds for unforeseen engineering modifications, regulatory requirements, or material price fluctuations improves financial flexibility.

Analyzing Operating Cost Risk

Energy Consumption


Although many continuous pyrolysis systems recover process gas for internal heating, external fuel and electricity remain significant operating expenses.

Energy cost analysis should consider:

  • Local fuel prices
  • Electricity tariffs
  • Heat recovery efficiency
  • Utility reliability

Improving thermal efficiency directly enhances project profitability.

Maintenance Expenditure


Continuous operation places sustained mechanical stress on reactors, conveyors, bearings, and sealing systems.

Preventive maintenance planning and spare parts inventory should be incorporated into long-term financial models rather than treated as occasional expenses.

Evaluating Market Demand

Product Sales Stability


Project economics depend heavily on the ability to sell output products at sustainable prices.

Potential revenue sources may include:

  • Pyrolysis oil
  • Biochar
  • Recovered carbon products
  • Syngas utilization
  • Recovered steel for tire processing projects
  • Carbon credit opportunities where applicable

Diversifying revenue streams reduces dependence on any single product market.

Price Volatility


Market prices for recovered products may fluctuate due to changes in crude oil prices, agricultural demand, environmental policy, or regional supply conditions.

Sensitivity analysis helps investors understand how price changes may affect project profitability.

Regulatory and Environmental Risk

Permitting Requirements


Continuous pyrolysis facilities often require multiple regulatory approvals before construction and operation.

These may include:

  • Environmental impact assessment approval
  • Air emission permits
  • Waste management authorization
  • Fire safety approval
  • Industrial operating licenses

Project schedules should incorporate sufficient time for regulatory review.

Compliance Costs


Environmental regulations continue to evolve, particularly regarding emissions and waste management.

Investors should anticipate future expenditures related to equipment upgrades, monitoring systems, and reporting requirements.

Construction and Commissioning Risk

Project Execution Challenges


Construction delays may result from:

  • Equipment delivery issues
  • Contractor coordination problems
  • Utility connection delays
  • Permit revisions
  • Supply chain disruptions

Comprehensive project management reduces schedule uncertainty and minimizes cost overruns.

Performance Verification


Commissioning should verify that the facility achieves its designed processing capacity, product quality, energy efficiency, and environmental performance before commercial operation begins.

Independent performance testing provides valuable assurance for investors.

Operational and Management Risk

Workforce Capability


Continuous pyrolysis facilities require experienced operators capable of maintaining stable process conditions and responding to abnormal situations.

Training programs should emphasize:

  • Process control
  • Equipment maintenance
  • Safety management
  • Quality assurance
  • Emergency procedures

Skilled personnel contribute significantly to long-term operational reliability.

Digital Monitoring


Modern facilities increasingly utilize automated monitoring platforms to collect production data, identify equipment degradation, and optimize operating parameters.

Data-driven management improves decision-making while reducing unexpected operational disruptions.

Building a Balanced Investment Strategy


Continuous pyrolysis projects offer considerable opportunities for resource recovery, circular economy development, and sustainable industrial growth. However, their long-term success depends on balancing technological capability with commercial viability, regulatory compliance, and operational excellence.

Investors who conduct comprehensive risk assessments across feedstock supply, technology maturity, financial planning, market demand, environmental compliance, and operational management are better positioned to achieve stable returns while minimizing uncertainty. A disciplined evaluation process transforms investment decisions from speculative ventures into strategically managed industrial opportunities.

Risk Mitigation Strategies for Safety Hazards in Plastic Pyrolysis Projects


Understanding the Intrinsic Risk Profile of Plastic Pyrolysis
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Plastic pyrolysis systems operate through thermal decomposition of hydrocarbon-based polymers in an oxygen-deficient environment. While this process enables valuable resource recovery, it inherently involves elevated operational risks due to high temperatures, combustible gases, pressurized systems, and complex chemical intermediates.

Unlike conventional mechanical recycling, plastic pyrolysis introduces a multi-phase hazard environment where thermal, chemical, and mechanical risks interact. Effective safety design is therefore not an auxiliary consideration but a core engineering requirement that defines operational viability.

Feedstock-Related Safety Hazards

Contamination and Reactive Impurities


The safety profile of a plastic pyrolysis machine is strongly influenced by feedstock composition. Waste plastic streams may contain:

  • Chlorinated polymers
  • Residual solvents
  • Metal contaminants
  • Moisture content variability
  • Mixed polymer fractions

Certain contaminants can generate corrosive gases or unstable reaction byproducts during thermal processing, increasing operational risk.

Feedstock Pre-Treatment Requirements


Proper pre-processing significantly reduces hazard potential. Standard safety-oriented measures include:

  • Magnetic separation of metals
  • Shredding and homogenization
  • Moisture reduction systems
  • Chlorine content screening

Failure to control feedstock quality can lead to unstable reactor conditions and unpredictable emissions.
Continuous Plastic Pyrolysis Plant

Thermal Runaway and Reactor Safety Control

Temperature Instability Risks


Plastic pyrolysis reactor operates at elevated temperatures typically ranging from 350°C to 600°C. Within this range, minor deviations in heat input or feedstock composition can trigger thermal instability.

Potential consequences include:

  • Accelerated gas generation
  • Pressure surges
  • Incomplete cracking reactions
  • Localized overheating zones


Multi-Layer Temperature Control Systems


Modern safety engineering relies on redundant thermal management strategies such as:

  • Distributed temperature sensors
  • Automated feedback control loops
  • Emergency cooling circuits
  • Independent safety shutdown systems

These mechanisms ensure that deviations are detected and corrected before reaching critical thresholds.

Pressure Accumulation and Gas Handling Risks

Non-Condensable Gas Behavior


Plastic pyrolysis generates significant volumes of non-condensable gases, including light hydrocarbons and hydrogen-rich mixtures. If not properly managed, these gases can accumulate within the system.

Risk scenarios include:

  • Overpressure in reactor vessels
  • Pipeline rupture
  • Flash ignition events
  • Backflow incidents


Pressure Relief Engineering


Effective mitigation requires integrated pressure control infrastructure:

  • Pressure relief valves
  • Gas buffer tanks
  • Flare or combustion units
  • Automated venting systems

These components ensure that abnormal pressure conditions are safely discharged or neutralized.

Flammability and Explosion Risk Management

Hydrocarbon Vapor Sensitivity


Pyrolysis oil and intermediate vapors are highly flammable under specific temperature and concentration conditions. This creates a dual-phase explosion risk involving both gas-phase and liquid-phase hydrocarbons.

Explosion Prevention Systems


Key preventive measures include:

  • Inert gas blanketing (nitrogen systems)
  • Oxygen monitoring and exclusion
  • Anti-static grounding systems
  • Flame arrestors in gas lines

These systems collectively reduce ignition probability and propagation potential.

Condensation and Liquid Handling Safety

Volatile Hydrocarbon Management


Condensation systems recover liquid hydrocarbons from pyrolysis vapors. However, these liquids may contain unstable fractions with low flash points.

Safety risks include:

  • Vapor leakage
  • Storage tank overpressure
  • Liquid volatilization
  • Spill-related ignition hazards


Safe Storage Infrastructure


Proper engineering design requires:

  • Sealed storage tanks with pressure control
  • Temperature-regulated storage zones
  • Secondary containment systems
  • Vapor recovery units

These features ensure safe handling of recovered oil products.

Solid Residue Handling Risks

Char Dust and Particulate Hazards


Solid residues from plastic pyrolysis often include fine carbonaceous particles that may present:

  • Dust explosion risks
  • Respiratory hazards
  • Static charge accumulation
  • Fire propagation potential


Dust Control Engineering


Effective mitigation includes:

  • Enclosed material handling systems
  • Dust extraction and filtration units
  • Humidity control measures
  • Anti-static material transfer systems

Proper design minimizes both occupational and process safety risks.

Mechanical System Safety Considerations

Equipment Wear and Failure Modes


Continuous operation of shredders, conveyors, and feeding systems introduces mechanical risks such as:

  • Bearing failure
  • Belt misalignment
  • Motor overheating
  • Structural fatigue

These failures can indirectly trigger process instability if feedstock flow is disrupted.

Predictive Maintenance Systems


Modern facilities reduce mechanical risk through:

  • Vibration monitoring systems
  • Infrared temperature scanning
  • Predictive maintenance algorithms
  • Scheduled component replacement

Early detection of wear conditions prevents cascading failures.

Fire Protection and Emergency Response Design

Multi-Stage Fire Suppression Systems


Given the combustible nature of inputs and outputs, fire protection must be multi-layered:

  • Automatic fire detection sensors
  • Foam or dry chemical suppression systems
  • Water spray cooling networks
  • Zoned isolation capabilities


Emergency Shutdown Protocols


A critical safety requirement is the ability to rapidly isolate and shut down the entire process chain. Emergency systems typically include:

  • Automatic feedstock cutoff
  • Reactor isolation valves
  • Gas system bypass routing
  • Controlled cooling sequences

These systems prevent escalation during abnormal conditions.

Control System Reliability and Cyber-Physical Safety

Automation Dependency Risks


Plastic pyrolysis plants rely heavily on automated control systems. Failure in these systems can lead to uncontrolled thermal or pressure conditions.

Redundant Control Architecture


To enhance reliability, safety-critical systems are often designed with:

  • Dual-redundant PLC systems
  • Independent safety instrumented systems (SIS)
  • Fail-safe default states
  • Real-time diagnostic monitoring

This layered architecture ensures operational continuity and safe shutdown capability.

Human Factors and Operational Discipline

Operator Training Requirements


Human error remains a significant contributor to industrial accidents. Comprehensive training programs must cover:

  • Emergency response procedures
  • Equipment operation protocols
  • Hazard recognition techniques
  • Standard operating procedures compliance


Safety Culture Integration


Sustainable risk mitigation depends on embedding safety awareness into daily operations rather than treating it as a compliance obligation.

Engineering a Safer Plastic Pyrolysis Ecosystem


Plastic pyrolysis inherently involves complex thermal and chemical processes that require rigorous safety engineering. Effective hazard mitigation depends on integrated system design across feedstock management, reactor control, gas handling, liquid storage, and solid residue processing.

When properly engineered, these systems can significantly reduce operational risks while maintaining efficient resource recovery. Safety in plastic pyrolysis is not achieved through isolated safeguards but through a cohesive architecture of redundancy, monitoring, and disciplined operational control.

Desktop environments: performance vs modern look


Some DEs are focused on resource efficiency, but don't look fancy. Others are fancy, but require a fairly modern setup. I have KDE (Fedora) installed on my laptop, I love its look and options. But it is not always snappy, some little freezes occur as well, even in basic situations (opening Firefox and v2rayN simultaneously was one of the cases). The most problematic thing is almost every app taking around 2-3 secs to open its window.

Many people would just tell me to install Xfce, but I still want a fancy desktop, I believe it is something I can afford on my setup. First I thought of GNOME, but it is controversial: some sources report GNOME as well optimized even for low-end machines, other claim it is much heavier than KDE.

What it your experience with desktop environments and their performance? Perhaps you have compared various DEs within the same distro and setup? How performant GNOME actually is compared to KDE? What are the balanced options to explore?

Notes on Picking an AI Image Generator in 2026


Model choice beats interface
Picking an AI image generator in 2026 comes down to the model, not the wrapper. The new Nano Banana 2 is great for fast clean edits, and GPT Image is the most reliable for text-in-image. You can try both free in the browser: Nano Banana 2 free generator and GPT Image generator. Tip: generate three variations from a tight prompt, then iterate on the closest one.

3 Cuban economists on Cuba’s postponed transition


By Juan Triana Cordoví, Omar Everleny Pérez-Villanueva, Julio Carranza & Rafael Hernández
Published 28 June, 2026 in Links International Journal of Socialist Renewal

Your burned CDs and DVDs are decaying, and the photos on them may already be gone


in reply to ☆ Yσɠƚԋσʂ ☆

Yes, the older ones of the rotating backups are still readable.

But that's not even the actual problem nowadays: CDs and DVDs were nice when their size was still relevant in comparison to usual amounts of data. The real problem behind their decay is that we are lacking a widely available, properly scaled backup solution for more than a decade. So the mean reason people have now unreadable optical data is that they stopped thinking about it a long time ago for an utter lack of options.

in reply to Ooops

So the mean reason people have now unreadable optical data is that they stopped thinking about it a long time ago for an utter lack of options.


Well, there are 100GB and 120GB Bluray M-Discs. But yeah, the only things larger are either spinning rust (i.e. HDDs that need to be refreshed regularly to prevent bit rot) or very expensive LTO hardware and tapes.

Best way to watch a directory for changes and auto-git-commit on Arch Linux?


I need a real-time filesystem watcher that detects when any file in ~/.hermes/config/ changes, then immediately git add -A && git commit -m "auto: ..." && git push.

Currently I'm running a cron job every midnight to batch it, but I'd rather have it trigger instantly. On Arch (btw) what's the cleanest approach?

I've looked at:
- incron — old, seems barely maintained
- systemd path units — native, but feels heavyweight for one small folder
- inotifywait in a loop — simple but fragile
- entr — neat but needs something to kick off the initial watch

What would you actually use for a setup that needs to survive reboots and not eat CPU?

This entry was edited (yesterday, 7:23 PM)

LastPass notifies users of yet another data breach


SOLVED!: Second drive disappeared after Mint reinstall


Solution: There never was a second drive. It must have been a partition that got wiped with the install, but there's only the NVME in there. Sorry, guys. I dig around in my innards very frequently and just thought I was mounting a second drive this entire time. Hooray for backups.

reinstalled Mint and my second drive is absolutely invisible to everything. I can't mount what I can't see. I'm thinking of unplugging it and plugging it back in just because I'm out of ideas.

What could have caused a drive to become invisible after a reinstall?

Edit: Checked bios. All security disabled. Using AHCI and UEFI (tried CSM). I don't really know what these things mean, I just know things were working properly before I reinstalled mint so I'm puzzled why it could be a BIOS issue.

Current lsblk:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
sr0 11:0 1 1024M 0 rom
nvme0n1 259:0 0 953.9G 0 disk
├─nvme0n1p1 259:1 0 1M 0 part
├─nvme0n1p2 259:2 0 513M 0 part /boot/efi
└─nvme0n1p3 259:3 0 953.4G 0 part /

This entry was edited (yesterday, 3:03 PM)

Francesca Woodman


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The enigmatic photography of Francesca Woodman...
Music: Pearls Before Swine-Another Time
woodmanfoundation.org/francesc…
This entry was edited (Tuesday, June 9, 2026, 12:33 PM)

Hugo parle de pleins de trucs


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Je parle de plein de trucs qui me passent par la tête, et c'est un appel à l'aide pour qu'on arrive à sortir la Ğ1 v2 !!

Merci à @Attilax pour le chapitrage :

1 - présentation (0:00 - 1:35)
2 - Explications détaillées de notre UNL et de la ML (1:35 - 15:40)
3 - Heureka (15:40 - 16 : 26)
4 - Création monétaire et règles du jeu (16:30 - 20:55)
5 - Une meilleure société (20:55 - 22:01)
6 - La confiance et les limites du "sans monnaie" (22:10 - 23:10)
7 - Duniter intro (24:13 - 27 : 10)
8 - La Toile de Confiance (27:15 - 28:54)
9 - DuniterV1 suite, historique et fonctionnement (29:00 - 37:25)
10 - Financement et DuniterV2 (37:26 - 42:05)
11 - S'investir dans la G1 (42:06 - 45:50)
12 - Crowdfunding et communication (45:50 - 48:25)
13 - Évènements (48:26 - 48:47)
14 - Bilan, vidéos et retours (48:48 - 52:38)
15 - Aider en adhérant à Axiom-team (52:40 -58:24)
16 - Plantage Cesium et correction de bug en direct (58:24 - 1:00:33)
17 - Les noeuds (1:00:34 - 1:05:17)
18 - Entrées, sorties et transparence (1:05:18 - 1:07:02)
19 - Pourquoi c'est privé ? Pourquoi adhérer ? (1:07:04 - 1:10:19)
20 - À l'aide ! (1:10:20 - 1:12:43)
21 - DuniterV2 et développeurs (1:12:44 - 1:13:59)
22 - Considérations personnelles et conclusion (1:14:00 - fin)

This entry was edited (yesterday, 9:20 AM)

Generating Original Music from Text with AI


A quick look at text-to-music tools

AI music generation has matured fast. Tools like Riffusion turn a simple text prompt into full songs, instrumentals and vocal ideas in seconds, which is great for creators who need original, royalty-free soundtracks.

The workflow is simple: describe the mood, tempo and style, then generate and refine. You can read more about the AI music generator and try it for free.

Disabling bloatware


I've discovered Akonadi, a KDE service. As far as I could understand, Akonadi provides "personal information management" and is responsible for some interaction between apps within the KDE ecosystem.
To me, it seems to be bloatware. Somebody may use the functions it provides, but I do not. It is just running in background all the time with no use.
1. How do I completely disable it forever?
2. Have you ever met something else in Linux or it's ecosystem, that appeared to be bloatware to you (and how did you disable it)?