Logging Monitoring

Oracle Linux 8 — e2fsprogs — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — e2fsprogs — security and stability fixes — required update (ELSA-2022-7720)

🟡 Medium   ⏱ 10–30 min  Last verified: 5 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7720 Related CVEs: CVE-2022-1304 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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Common Problems 118617

Ubuntu 16.04 LTS snapd Refresh Fails with Certificate Errors

🟡 Medium   ⏱ 5–30 min  Last verified: 5 March 2021 Affected versions: 16.04 LTS 📖 ~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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FreeBSD 12 — syncthing — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — syncthing — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 March 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: syncthing — crash due to malformed relay protocol message Related CVEs: CVE-2021-21404 Upstream summary: syncthing developers report: syncthing can be caused to crash and exit if sent a malformed relay […]

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openSUSE Tumbleweed — python36-rtslib-fb — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36-rtslib-fb — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:1156-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-14019 Upstream summary: Open-iSCSI rtslib-fb through 2.1.72 has weak permissions for /etc/target/saveconfig.json because shutil.copyfile (instead of shutil.copy) is used, and thus permissions are not preserved. […]

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How to Set Up Cockpit Web Console on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Cockpit Web Console on Oracle Linux 8

Introduction Setting up set up cockpit web console on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up Cockpit Web Console on Oracle Linux 8, with all the commands you need, the SELinux and firewalld […]

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Common Problems 115577

systemctl Restart Hangs Because Dependency Is Deadlocked

🟡 Medium   ⏱ 5–30 min  Last verified: 5 March 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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Ubuntu 20.04 — ipmitool — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — ipmitool — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 March 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5997-1 Related CVEs: CVE-2020-5208 Upstream summary: It was discovered that IPMItool was not properly checking the data received from a remote LAN party. A remote attacker could possibly use this […]

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Common Problems 115527

firewalld Zone Misassignment Breaks App Reachability

🟡 Medium   ⏱ 5–30 min  Last verified: 5 March 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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SLES 15 — ruby2.5-rubygem-kramdown — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — ruby2.5-rubygem-kramdown — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 5 March 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:3259-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-14001 Upstream summary: The kramdown gem before 2.3.0 for Ruby processes the template option inside Kramdown documents by default, which allows unintended read access (such […]

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How to Configure IBM PowerHA SystemMirror on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure IBM PowerHA SystemMirror on IBM AIX 7.2

Introduction IBM AIX 7.2 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 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure ibm powerha systemmirror on ibm aix 7.2 on […]

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