Linux

Ubuntu 20.04 — lynx — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — lynx — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4800-1 Related CVEs: CVE-2016-9179 CVE-2017-1000211 CVE-2021-38165 Upstream summary: It was discovered that Lynx incorrectly handled certain URLs. A remote attacker could possibly use this issue to obtain sensitive information or […]

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How To Install and Configure Postfix as a Send-Only SMTP Server on Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

How To Install and Configure Postfix as a Send-Only SMTP Server on Ubuntu 20.04

Postfix is a mail transfer agent (MTA), an application used to send and receive email. It can be configured so that it can be used to send emails by local application only. In this tutorial, you’ll install and configure Postfix on Ubuntu 20.04 as a send-only SMTP server. You’ll also request free TLS certificates from Let’s Encrypt for your domain and encrypt the outbound emails using them.

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Oracle Linux 8 — java-1.8.0-openjdk — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-1.8.0-openjdk — vulnerability — patch and remediation guide (ELSA-2020-2972)

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2972 Related CVEs: CVE-2020-14578 CVE-2020-14579 CVE-2020-14583 CVE-2020-14556 CVE-2020-14577 CVE-2020-14593 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Gentoo Linux — app-arch/rpm — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-arch/rpm — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202210-22 Related CVEs: CVE-2021-3521 CVE-2021-35937 CVE-2021-35938 CVE-2021-35939 CVE-2021-20266 CVE-2021-20271 CVE-2021-3421 Upstream summary: Multiple vulnerabilities have been discovered in RPM. Please review the CVE identifiers referenced below for details. Table of contents Symptom […]

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How To Configure Custom Connection Options for your SSH Client — step-by-step Linux tutorial on Progressive Robot

How To Configure Custom Connection Options for your SSH Client

OpenSSH, the most common SSH client on most systems, allows you to provide customized connection options. These can be saved to a configuration file that contains different options per server. This can help keep the different connection options you use for each host separated and organized, and avoids having to provide extensive options on the command line whenever you need to connect.

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

Oracle Linux 8 — glibc security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-4358)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 May 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4358 Related CVEs: CVE-2021-35942 CVE-2021-27645 CVE-2021-33574 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 118527

Ubuntu 16.04 LTS PHP 7.0-FPM not running

🟡 Medium   ⏱ 5–30 min  Last verified: 24 May 2021 📖 ~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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AlmaLinux 8 — spacewalk-client-cert — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — spacewalk-client-cert — 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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