🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-0549 Related CVEs: CVE-2020-7754 CVE-2020-7788 CVE-2020-8265 CVE-2020-8287 CVE-2019-10746 CVE-2019-10747 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]
This tutorial covers creating a simple web application on a two-tier CentOS 7 architecture using a “ground-up” approach. I.e. creating the a database tier first, then the web server. The site will be powered by an Nginx web server running PHP code that talks to a PostgreSQL database. We will call this configuration a LEPP (Linux, Nginx, PHP, PostgreSQL) stack.
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2020-5562-1 Related CVEs: CVE-2020-26974 CVE-2020-35113 CVE-2020-26971 CVE-2020-26978 CVE-2020-16042 CVE-2020-26973 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]
In this tutorial you will build a Slackbot in the Python programming language. As a fun proof-of-concept that will demonstrate the power of Python and its Slack APIs, you will build a `CoinBot`–a Slackbot that monitors a channel and, when triggered, will flip a coin and give you the results. You can then modify your `CoinBot` to fulfill any number of _slightly_ more practical applications.
How to Install and Configure Memcached on RHEL 7 Memcached is a high-performance, distributed memory object caching system used to speed up dynamic web applications by reducing database load. It stores frequently requested data — such as database query results, session data, and rendered page fragments — in RAM, allowing subsequent requests to be served […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read • Source: AlmaLinux ALSA ALSA-2021:1586 Related CVEs: CVE-2019-13012 CVE-2020-13543 CVE-2020-13584 CVE-2020-16125 CVE-2020-9948 CVE-2020-9951 CVE-2020-9983 CVE-2021-1817 +4 more Upstream summary: GNOME is the default desktop environment of AlmaLinux. The following packages have been upgraded to a later […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2023-7165 Related CVEs: CVE-2023-32324 CVE-2023-34241 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 4.1.0-r0 📖 ~4 min read • Source: Alpine secdb entry — newlib 4.1.0-r0 Related CVEs: CVE-2021-3420 Upstream summary: Alpine community repository for vedge ships newlib 4.1.0-r0 which addresses CVE-2021-3420. Table of contents Symptom & Impact Environment […]
🟠 High ⏱ 5–30 min Last verified: 19 May 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 […]
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read • Source: Gentoo GLSA GLSA-202012-18 Related CVEs: CVE-2020-17482 Upstream summary: It was discovered that PowerDNS did not properly handle certain unknown records. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]
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