October 2020 - Page 51 of 69

How To Install Graylog 1.x on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Install Graylog 1.x on Ubuntu 14.04

In this tutorial, we will cover how to install Graylog v1.3.x (sometimes referred to as Graylog2) on Ubuntu 14.04, and configure it to gather the syslogs of your systems in a centralized location. Graylog is a powerful log management and analysis tool that has many use cases, from monitoring SSH logins and unusual activity to debugging applications. It is based on Elasticsearch, Java, and MongoDB.

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Android RxJava and Retrofit — step-by-step DevOps tutorial on Progressive Robot

Android RxJava and Retrofit

In this tutorial, we'll be implementing [Retrofit](/community/tutorials/retrofit-android-example-tutorial) calls using [RxJava](/community/tutorials/rxjava-tutorial) in android app. We'll be creating an application that populates a RecyclerView using Retrofit and RxJava. We'll be using a CryptoCurrency API. What Will You Learn? Making a Retrofit call using RxJava. Doing Multiple Retrofit Calls Using RxJava Transforming the Retrofit POJO response using RxJava […]

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Oracle Linux 8 — kernel security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2023-3847)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-3847 Related CVEs: CVE-2023-28466 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Common Problems 117407

Ubuntu 20.04 Wi-Fi Adapter Not Detected

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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Gentoo Linux — sci-mathematics/cgal — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — sci-mathematics/cgal — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202305-34 Related CVEs: CVE-2020-28601 CVE-2020-28602 CVE-2020-28603 CVE-2020-28604 CVE-2020-28605 CVE-2020-28606 CVE-2020-28607 CVE-2020-28608  +12 more Upstream summary: Multiple vulnerabilities have been discovered in CGAL. Please review the CVE identifiers referenced below for details. Table […]

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Common Problems 115986

Ubuntu 26.04 LTS – Kubelet not registering node due to cgroup mismatch – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]

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