March 2021 - Page 9 of 63

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2020-5996)

• March 28, 2021
• Linux
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🟠 High   ⏱ 15–60 min  Last verified: 28 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5996 Related CVEs: CVE-2020-8695 CVE-2020-25704 CVE-2020-27673 CVE-2020-25656 CVE-2020-28915 CVE-2020-25668 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How To Add Swap on Ubuntu 14.04

• March 28, 2021
• Linux
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Swap space can be used as an “overflow” area for your system when you run out of RAM. The operating system can store data that would normally be kept in RAM on the hard drive in a specially formatted file. In this guide, we’ll demonstrate how to create and use one of these files in Ubuntu 14.04.

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How to Install Ruby on Rails on Debian 9

• March 28, 2021
• Linux
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Introduction How to Install Ruby on Rails on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. […]

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Oracle Linux 8 — go-toolset:ol8 — security and stability fixes — required update (ELSA-2022-1819)

• March 27, 2021
• Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 27 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1819 Related CVEs: CVE-2021-38297 CVE-2021-41771 CVE-2022-23772 CVE-2022-23806 CVE-2021-41772 CVE-2021-39293 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Debian 9 – time synchronization fails causing TLS and auth errors

• March 27, 2021
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 27 March 2021 Affected versions: Debian 9 📖 ~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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Windows Server 2016 – Hyper-V VM networking packet loss caused by VMQ mismatch – Fix & Prevention

• March 27, 2021
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 27 March 2021 Affected versions: Windows Server 2016 📖 ~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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Ubuntu 20.04 — libdbi-perl — multiple vulnerabilities (2 CVEs) — patch and remediation guide

• March 27, 2021
• Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 27 March 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5030-1 Related CVEs: CVE-2014-10402 CVE-2020-14393 Upstream summary: It was discovered that the Perl DBI module incorrectly opened files outside of the folder specified in the data source name. A remote […]

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How to Configure PostgreSQL Replication on Oracle Linux 8

• March 27, 2021
• Oracle Linux
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Introduction How to Configure PostgreSQL Replication on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]

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Windows Server 2016 Tiered Storage Spaces Not Rebalancing Hot Data Correctly – Fix & Prevention

• March 27, 2021
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 27 March 2021 Affected versions: Windows Server 2016 📖 ~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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How to Set Up Samba for Windows File Sharing on IBM AIX 7.1

• March 27, 2021
• IBM AIX
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Introduction IBM AIX 7.1 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to set up samba for windows file sharing on ibm […]

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