February 2021 - Page 30 of 62

Amazon Linux 2 — json-c — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — json-c — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2020-1442 Related CVEs: CVE-2020-12762 Upstream summary: json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend. (CVE-2020-12762) Table of contents Symptom […]

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Common Problems 115495

RHEL 7 MariaDB service Fails After Unclean Shutdown

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: RHEL 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 & Hardening Related Errors & […]

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How to Manage Users and Groups on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Manage Users and Groups on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying manage users and groups on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Manage Users and Groups on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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FreeBSD 12 — py34-salt — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py34-salt — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: salt — multiple vulnerabilities in salt-master process Related CVEs: CVE-2016-1866 CVE-2016-3176 CVE-2017-12791 CVE-2017-14695 CVE-2017-14696 CVE-2018-15750 CVE-2018-15751 CVE-2019-17361  +2 more Upstream summary: F-Secure reports: CVE-2020-11651 – Authentication bypass vulnerabilities The ClearFuncs […]

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How to Configure Multi-Site Active Directory on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Multi-Site Active Directory on Windows Server 2016

Introduction A multi-site Active Directory deployment on Windows Server 2016 maps your physical network topology onto AD Sites and Services, ensuring that domain controllers authenticate users with the nearest DC rather than sending login traffic across slow WAN links. AD Sites control replication traffic, Kerberos referrals, and Group Policy application. This guide covers designing and […]

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Ubuntu 20.04 — libexif — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libexif — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4624-1 Related CVEs: CVE-2020-0452 CVE-2020-0093 CVE-2020-0182 CVE-2020-0198 CVE-2020-13112 CVE-2020-13113 CVE-2020-13114 CVE-2018-20030  +1 more Upstream summary: It was discovered that libexif incorrectly handled certain inputs. An attacker could possibly use this […]

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Sorting a Vector in C++ — step-by-step Programming tutorial on Progressive Robot

Sorting a Vector in C++

URL: https://www.progressiverobot.com/sorting-a-vector-in-c-plus-plus/ Introduction In this tutorial, we are going to focus on Sorting a Vector in C++. Sorting is one of the vastly performed operations in any programming language. Similarly, in C++ too, there are several algorithms following which we can sort any data structure. For [vectors](/community/tutorials/vectors-in-c-plus-plus), in particular, we can perform sorting operations in […]

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Ubuntu 18.04 — cpanminus — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — cpanminus — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5230-1 Related CVEs: CVE-2020-16154 Upstream summary: It was discovered that App::cpanminus did not properly verify CHECKSUMS files. An attacker could possibly use this issue to bypass signature verification, gaining access […]

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Cómo usar ps, kill y nice para administrar procesos en Linux — step-by-step Linux tutorial on Progressive Robot

Cómo usar ps, kill y nice para administrar procesos en Linux

La administración de procesos es una habilidad esencial al usar cualquier sistema informático. Esto es especialmente cierto cuando se administra un entorno de servidores. Este artículo presentará algunas herramientas potentes que pueden usarse para administrar los procesos en un sistema Linux.

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