July 2021 - Page 36 of 69

How To Use CASE Expressions in SQL — step-by-step DevOps tutorial on Progressive Robot

How To Use CASE Expressions in SQL

CASE expressions are a feature in Structured Query Language (SQL) that allow you to apply similar logic to database queries and set conditions on how you want to return or display the values in your result set. In this tutorial, you’ll learn how to use the CASE expression to set conditions on your data using WHEN, THEN, ELSE, and END keywords.

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AlmaLinux 8 — rhnpush — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — rhnpush — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2019:3355 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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

Oracle Linux 8 — linux-firmware security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2023-7109)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-7109 Related CVEs: CVE-2023-20569 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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openSUSE Tumbleweed — python36-jupyter-server — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36-jupyter-server — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2020-26232 Upstream summary: Jupyter Server before version 1.0.6 has an Open redirect vulnerability. A maliciously crafted link to a jupyter server could redirect the browser […]

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openSUSE Tumbleweed — libtcmu2 — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libtcmu2 — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2021:0060-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-28374 Upstream summary: In drivers/target/target_core_xcopy.c in the Linux kernel before 5.10.7, insufficient identifier checking in the LIO SCSI target code can be used by remote […]

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Common Problems 117427

Ubuntu 20.04 Broken Dependencies and Held Packages

🟡 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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IBM AIX 7.2 — CVE-2021-20549 — xss — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2021-20549 — xss — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 25 May 2026 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2021-20549, IBM Support Bulletin CVE: CVE-2021-20549 NVD summary: IBM Content Navigator 3.0.CD is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering […]

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How to Set Up the ELK Stack on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up the ELK Stack on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up the elk stack on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any […]

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Использование CDN для ускорения загрузки статичного контента — step-by-step DevOps tutorial on Progressive Robot

Использование CDN для ускорения загрузки статичного контента

Современные веб-сайты и приложения часто должны предоставлять большое количество статичного контента конечным пользователям. Это могут быть изображения, таблицы стилей, файлы JavaScript и видео. По мере роста количества и размера таких статичных активов, значительно увеличивается…

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