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How to fix Prometheus "open /prometheus/queries.active: permission denied" on Kubernetes: step-by-step

The article discusses resolving the "open /prometheus/queries.active: permission denied" error encountered while setting up Prometheus on a k3s cluster using a Helm chart with a local volume.
The issue stemmed from Prometheus not having the necessary permissions to create files within the /prometheus directory in the container, possibly due to user UID mismatches.
The user account in Prometheus' Dockerfile was set to nobody, leading to ownership discrepancies with the directory on the host machine.
The solution involved changing the directory owner on the host machine to nobody, aligning it with the user inside the container, thus resolving the permission denied error.
Key takeaways include ensuring directory ownership matches the container user and permissions in local-path storage class deployments in Kubernetes.
Best practices from Linux administration can be applied in Kubernetes, emphasizing the importance of aligning host machine configurations with bind mounts.
The troubleshooting process was codified into an Ansible playbook to automate directory ownership adjustments during Prometheus Helm chart deployment.
In summary, the error was caused by user ownership disparities between the PersistentVolume directory and the container user, which was fixed by adjusting the directory owner on the host machine to match the container user.
To fix the issue, users can change the directory permissions on the host machine to match the user inside the container and delete and recreate the failing pod if needed.

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Coolsmartphone

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Remote to Mac On Oppo Find N5

The Oppo Find N5 offers a unique feature that allows it to be used as a remote control to access a Mac.
With the O+Connect service, users can establish a remote control connection between the Find N5 and a Mac or MacBook.
This feature enables file transfer over WiFi, eliminating the need for a wired USB connection.
The Find N5 also offers a multi-connect function that allows interaction with other OnePlus devices.

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Medium

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AI’s Quiet Symphony: Creating the Ideal Wine Combination

AI is transforming the art of wine blending from an intuitive process to a data-informed partnership between machine intelligence and human expertise.

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Ubuntu

309

Faizul "Piju" 9M2PJU: Unlocking Performance: The Power of Custom Linux Kernels and Liquorix

Custom Linux kernels, like Liquorix, cater to power users, gamers, and professionals seeking enhanced performance and responsiveness.
Custom kernels prioritize aspects like CPU scheduling, reduced latency, better I/O performance, power management, and specialized features.
Liquorix is a popular custom kernel focusing on high-performance interactive computing, favored by gamers and multimedia professionals.
Key features of Liquorix include optimized CPU scheduling, improved block layer performance, enhanced virtual memory management, and low-latency CPU scheduling.
The Liquorix kernel also offers optimized CPU frequency scaling, high-resolution scheduling, hard kernel preemption, and optimized disk scheduling.
Additionally, Liquorix implements TCP BBR2 congestion control, compressed swap support, and ensures easy installation and broad compatibility.
Installation of Liquorix on Debian, Ubuntu, or Arch-based distributions is straightforward using official scripts or package managers.
Liquorix is recommended for gamers, content creators, developers, and users on modern hardware seeking a responsive desktop experience.
However, Liquorix may not be suitable for enterprise servers, very old hardware, and battery-conscious laptop users.
Using custom kernels like Liquorix can significantly enhance gaming, multimedia production, and overall system responsiveness on Linux.

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Dev

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Oracle 23ai — Track Table and Partition Scan Access

Oracle 23ai introduces a new view named [dba|all|user]_table_access_stats.
The new view allows users to view the access history of tables and partitions.
The view shows the number of times each table or partition has been scanned, and the last time a table was accessed.
The view provides valuable insights into table and partition access patterns and can help optimize performance.

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Macstories

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Lux’s Sebastiaan de With on the iPhone 16e’s Essential Camera Experience

The iPhone 16e lacks some essential features such as MagSafe and multiple cameras, but retains important aspects such as build quality, OLED screen, iOS, and Face ID.
Compared to the iPhone 16 Pro, the 16e's camera supports fewer features and captures less detail, especially in low-light conditions.
Despite the differences, the iPhone 16e's camera is impressive and delivers excellent results in video recording.
With the help of photo and video apps like Lux's Halide and Kino, the iPhone 16e offers a great way to enjoy essential iPhone photography.

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Ubuntu

Faizul "Piju" 9M2PJU: Unlocking the Power of GridTracker for Amateur Radio Operators

GridTracker is a comprehensive and powerful amateur radio tool that offers a range of functions beyond FT8.
It provides advanced mapping, real-time contact tracking, customizable alerts, callsign lookup, and seamless logging integration.
GridTracker is a valuable asset for amateur radio operators, allowing them to optimize their operations and enhance their radio experience.
For more information, visit https://gridtracker.org/

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Dev

278

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Galaxy Book Pro's Internal Speaker Audio Issue fix: Fixing Silent Speakers on Fedora Using an HDA Verb Script

This guide provides a solution for fixing silent internal speakers on a Samsung Galaxy Book Pro running Fedora Linux.
It addresses the issue of Realtek ALC298 codec not initializing the onboard speaker amplifier by default.
Steps include installing ALSA utilities, downloading a necessary-verbs.sh script, configuring systemd, and testing speakers.
Disclaimer provided emphasizes the workaround nature of the solution and advises caution in applying the steps.
The guide details installing required tools like alsa-tools for sending low-level commands to the codec.
Downloading the script, moving it to a system location, and setting up a systemd service for automatic initialization are covered.
Enabling and starting the systemd service, testing internal speakers, and configuring for suspend/resume are also included.
Final steps involve verification, troubleshooting, hardware, and software information about the system used in the guide.
By following these steps, users can ensure their internal speakers function correctly on the Galaxy Book Pro.
The workaround replicates the missing initialization sequence for the Realtek ALC298 codec.

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Medium

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Creating a Self-Signed SSL Certificate

A self-signed certificate is an identity certificate signed by the same entity whose identity it certifies.
SSL/TLS is widely adopted for securing transactions over the web.
To create a self-signed SSL certificate, you need to generate a private key and a certificate signing request (CSR).
After generating the certificate, it should be installed on the server and the server configuration should be updated accordingly.

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Dev

282

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ps --forest | for navigating Oracle PID's

A ps (Process Status) Session involves analyzing active processes running on a Linux system using the ps command.
Running ps -ef --forest allows administrators to visualize parent-child relationships between processes for tracking user activities and troubleshooting performance issues.
Oracle DBAs commonly use commands like pf -ef|grep pmon to check database and listener processes.
ps -ef --forest provides a hierarchical view of running processes, aiding in visualizing process relationships and dependencies for troubleshooting.
By using ps -ef --forest, one can identify parent processes, track user sessions, and analyze process dependencies on a Linux system.
Visualizing session hierarchy with ps -ef --forest assists in understanding process initiation, parent-child relationships, and unexpected processes.
Running ps -ef --forest portrays a tree-like structure of processes, showing how user sessions and services interact and spawn on the system.
To filter Oracle-related sessions using ps -ef --forest, one can use a grep command to focus on processes related to 'oracle' or 'sqlplus.'

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Ubuntu Handbook

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How to Restore Deleted Files Under /etc Directory in Ubuntu

To restore deleted files under /etc directory in Ubuntu:
1. Find out which package includes the file/files using dpkg or ucfq command.
2. Re-install the package and specify to create non-existing files.
3. Use the sudo UCF_FORCE_CONFFMISS=1 apt -o Dpkg::Options::=--force-confmiss install --reinstall command.

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Medium

251

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Microsoft’s Copilot AI Coming to Xbox App | VBM

Microsoft's Copilot AI is coming to the Xbox app.
The AI assistant will offer personalized game recommendations, save-file recaps, and in-game tips.
Copilot follows the principles of capability, adaptability, and personalization.
Microsoft plans to expand Copilot to PC and console platforms in the future.

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Cultofmac

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M4 MacBook Air: Perfect for practically everybody [Review] ★★★★★

The 2025 MacBook Air with Apple’s M4 processor is a powerful and lightweight option, offering excellent performance at an affordable price.
Featuring the M4 chip, the MacBook Air delivers remarkable power and efficiency, making it a top choice for daily tasks.
With a starting price of $999, the MacBook Air boasts an outstanding design, 18-hour battery life, and Apple Intelligence support.
The laptop comes with 256GB storage, 16GB unified memory, and two Thunderbolt 4 ports, with options to upgrade storage and memory.
The M4 MacBook Air's design resembles the MacBook Pro, featuring a slim and lightweight body with improved ergonomics.
The laptop's keyboard, trackpad, and hinge offer a seamless user experience, although the keyboard lacks backlight controls.
Available in colors like sky blue, the MacBook Air's display impresses with a bright 500-nit Retina display and P3 color gamut.
Ports include Thunderbolt 4 for connectivity, with support for up to two 6K displays and charging accessories with a single cable.
Performance-wise, the M4 MacBook Air outperforms previous models and rivals even more expensive Mac options like the Mac mini.
Overall, the M4 MacBook Air is highly recommended for those seeking a lightweight and powerful laptop, offering a balance of performance and portability.

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Androidauthority

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Android’s Linux Terminal app adds tabs so you can multitask more easily

Google has added a tabbed interface to the Terminal app in Android 16 Beta 3.
The Terminal app lets you run Linux apps in a virtual machine on your Android device.
Adding tabs makes it easier to multitask, as you can issue commands without having to wait for a process to complete.
The tabs in the Terminal app are similar to those in a web browser, with a title, a button to close them, and a button to open new ones.

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Dev

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Solving issue "The repository 'http://ports.ubuntu.com/ubuntu-ports noble-security InRelease' is not signed"

The repository 'http://ports.ubuntu.com/ubuntu-ports noble-security InRelease' is not signed.
The issue is due to lack of storage space caused by the disk usage limit setting in Docker Desktop.
To resolve the problem, set the disk usage limit to a higher value.

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