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Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide (ELSA-2020-0127)

🟠 High   ⏱ 15–60 min  Last verified: 14 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-0127 Related CVEs: CVE-2019-17022 CVE-2019-17017 CVE-2019-17016 CVE-2019-17026 CVE-2019-17024 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Android Custom Action Bar Example Tutorial — step-by-step DevOps tutorial on Progressive Robot

Android Custom Action Bar Example Tutorial

In this tutorial we will create an app that consists of Android Custom Action Bar with a custom layout. We assume that you have a basic understanding of the ActionBar component discussed in [this tutorial](/community/tutorials/android-actionbar-example-tutorial). Android Custom Action Bar To customise an ActionBar first we need to configure the Theme in the res/values/styles.xml and set […]

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How to Set Up Grafana Alerting and Notification Channels on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up Grafana Alerting and Notification Channels on RHEL 8

Grafana 10 ships with a completely redesigned unified alerting engine that replaces the older panel-level alerts, offering multi-dimensional alert rules, flexible notification policies, and first-class support for external notification channels including Slack, email, and PagerDuty. Rather than binding an alert to a single dashboard panel, unified alerting lets you define alert rules independently against any […]

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Oracle Linux 8 — raptor2 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — raptor2 — security and stability fixes — required update (ELSA-2021-1842)

🟡 Medium   ⏱ 10–30 min  Last verified: 13 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1842 Related CVEs: CVE-2017-18926 CVE-2020-25713 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Common Problems 119001

Ubuntu 14.04 LTS failed to fetch archive packages with 404 Not Found

🟡 Medium   ⏱ 5–30 min  Last verified: 13 January 2021 Affected versions: 14.04 14.04.6 📖 ~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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Common Problems 118416

Ubuntu 16.04 LTS – apt update shows NO_PUBKEY signature failures

🟠 High   ⏱ 5–30 min  Last verified: 13 January 2021 Affected versions: Ubuntu 16.04 LTS Ubuntu 16.04 Ubuntu 16.04.7 📖 ~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 […]

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Ubuntu 20.04 — libpodofo — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libpodofo — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 13 January 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7217-1 Related CVEs: CVE-2017-5886 CVE-2018-11255 CVE-2018-12983 CVE-2018-20797 CVE-2018-5308 CVE-2018-8002 CVE-2019-10723 CVE-2020-18971  +2 more Upstream summary: It was discovered that the PoDoFo library could dereference a NULL pointer when getting the […]

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How to Install Ruby on Rails on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Install Ruby on Rails on SLES 12

Introduction This tutorial covers How to Install Ruby on Rails on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: zypper […]

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