# pocguru.com

> Unleash Your IT Potential: Expert Insights and Tips for Tech Enthusiasts


## Posts

- [Quick Tip: How to Update All Dependencies in a Maven Project using single command.](https://pocguru.com/2024/quick-tip-how-to-update-all-dependencies-in-a-maven-project-using-single-command/): When working on a Maven project, it’s important to keep your dependencies up-to-date to benefit from the latest features, bug fixes, and security patches. Maven provides a convenient way to update all dependencies in your pom.xml file using the mvn versions:use-latest-versions command. After running the above command will scan your pom.xml file and update the versions of all ... Read more
- [Podman on mac: tls failed to verify certificate: x509: certificate signed by unknown authority](https://pocguru.com/2023/podman-on-mac-tls-failed-to-verify-certificate-x509-certificate-signed-by-unknown-authority/): Recently when using podman on mac system, I encountered the error when pulling UBI base image from Red Hat’s registry. Here is the error from terminal I realised that, since, I was using a VM created using podman machine init command, adding the cert to my host machine was not going to help. Therefore we ... Read more
- [CoreOS: Adding CA certificates to list of trusted CA's in system](https://pocguru.com/2023/coreos-adding-ca-certificates-to-list-of-trusted-cas-in-system/): In CoreOS if you want to add CA certificate to the list of trusted CA”s in the system, there are 2 options. Using “/usr/share/pki/ca-trust-source/” directory: /usr/share/pki/ca-trust-source/ contains CA certificates and trust settings in the PEM file format. The trust settings found in this directory will be interpreted with a low priority. To add a certificate ... Read more
- [Linux store stderr in a variable](https://pocguru.com/2023/linux-store-stderr-in-a-variable/): First thing that we need to keep in mind is that in Linux everything is treated as a file. Also each open file is assigned a unique number called file descriptor. Also there are 3 standard streams. Each one of them as a unique file descriptor Let’s take one example, below we are trying to ... Read more
- [Use Ingress to direct traffic to an HTTPS backend](https://pocguru.com/2023/use-ingress-to-direct-traffic-to-an-https-backend/): Recently working on exposing an application which was running on HTTPS port, I used following yaml to create ingress. Note here that backend service “connaisseur-svc-health” was redirecting traffic to a pod which was listening on HTTPS port only. Therefore backend service was only reachable via HTTPS . When accessing this via Ingress I got an ... Read more
- [Ansible async_status could not find job.](https://pocguru.com/2023/ansible-async_status-could-not-find-job/): Recently while using Ansible async_status module to get status of previously ran async tasks I got an error :- In Ansible we know that, to run tasks asynchronously we can use async and poll. Also ansible.builtin.async_status module can be used to obtain status of asynchronous task. This was confusing to me because same task was ... Read more
- [How do I fix NoneType attribute error in Python?](https://pocguru.com/2023/how-do-i-fix-nonetype-attribute-error-in-python/): NoneType attribute error in Python? Recently while running a Python program I encountered an error AttributeError: 'NoneType' object has no attribute 'xxx'. When looking at the code, I could not initially identify why this was happening. Later on I realized that I was setting an attribute on a function that was returning ‘None’ . Therefore ... Read more
- [GitHub Copilot Extension activation failed: "getaddrinfo EAI_AGAIN api.github.com"](https://pocguru.com/2023/github-copilot-extension-activation-failed-getaddrinfo-eai_again-api-github-com/): Recently for me GitHub Copilot extension activation failed on Visual Studio Code, I got an error ‘Extension activation failed: “getaddrinfo EAI_AGAIN api.github.com”‘ In this case I was using proxy to connect to internet. To solve this problem, I had to follow directions in following article to setup proxy in Visual Studio Code. Also helpful links ... Read more
- [Enhanced Image Generation: Discovering the Exciting Features of Midjourney v5.2](https://pocguru.com/2023/enhanced-image-generation-discovering-the-exciting-features-of-midjourney-v5-2/): Introduction: Midjourney, the cutting-edge text-to-image generation model, has recently unveiled its latest version, ¸This update brings a host of exciting features that push the boundaries of aesthetic intricacy and provide users with enhanced options for creating stunning visuals. In this blog post, we will explore six spectacular features of Midjourney v5.2 that will elevate your ... Read more
- [How to check if port is opened without telnet OR custom script ?](https://pocguru.com/2023/how-to-check-if-port-is-opened-without-telnet-or-custom-script/): Sometimes we might need to check if a specific network port is opened for various reasons. There are various tool available out there and most of them serves the purpose. In this article, we will talk about few tools that can be used to check if a port is opened, without needing to write a ... Read more
- [Login to Kubernetes Pods, without knowing pod names ?](https://pocguru.com/2023/login-to-kubernetes-pods-without-knowing-pod-name/): There are many ways to login to kubernetes pods, and most of them requires you to know the pod name. Now let’s say we want to login to a pod that is being served by a service we want to troubleshoot. One longer way could be to first determine all the pods running behind service, ... Read more
- [PIP in docker - RuntimeError: can't start new thread.](https://pocguru.com/2023/pip-in-docker-runtimeerror-cant-start-new-thread/): Recently while working on docker image build, running on RHEL7, we encountered an issue with pip install. The job was failing with error “RuntimeError: can't start new thread”  Here is how Jenkins error logs looked like – Here is how docker version looked like – OS Version Dockerfile Resolution After some troubleshooting, we decided to ... Read more
- [List PODS behind a service in OpenShift.](https://pocguru.com/2022/list-pods-behind-a-service-in-openshift/): In Kubernetes service object is responsible for providing network access to a set of pods, which runs same images/applications, leading similar functionality. Sometimes we may want to list/check pods running behind a service in OpenShift cluster. Here are steps one can follow to do so :- Let’s start by listing the end-points for a service. ... Read more
- [OpenShift - kubectl get custom output using JSONPath and custom-columns.](https://pocguru.com/2021/openshift-kubectl-get-custom-output-using-jsonpath-and-custom-columns/): Sometimes we may want to get custom output from oc/kubectl commands when looking for k8 cluster objects like namespace, pods, etc. In this article, we will explain how to use JSONPath or custom column options to customize the kubectl output. We will use ‘service’ as an example. 1. JSONPath Query JSONPath is a query language for ... Read more
- [How to Create User Accounts in Linux](https://pocguru.com/2019/how-to-create-and-manage-user-accounts-in-linux/): In the world of Linux, user accounts play a vital role in system administration and security. This blog post serves as a comprehensive guide on creating and managing user accounts in Linux. Whether you’re a beginner or looking to deepen your knowledge, this step-by-step tutorial will equip you with the essential skills to effectively manage ... Read more
- [The Exciting World of AI: How It's Transforming Businesses](https://pocguru.com/2019/the-exciting-world-of-ai-how-its-transforming-businesses/): The Rise of AI Artificial Intelligence (AI) has been a buzzword in the tech industry for quite some time now, and for good reason. It has the potential to transform the way businesses operate and revolutionise various industries. From chatbots that enhance customer service to machine learning algorithms that analyse vast amounts of data, AI ... Read more

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- [About US](https://pocguru.com/about-us/): Hi There ! My name is Vikas Choata and I welcome you to POCGuru, your go-to source for expertise in the vast realm of IT technology, software, AI, and Linux. Our mission is to empower individuals and businesses with invaluable knowledge and insights, crafted by seasoned professionals in the field. With a deep passion for ... Read more
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