Operations

Ubuntu 22.04 — etcd — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — etcd — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 April 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6189-1 Related CVEs: CVE-2021-28235 Upstream summary: It was discovered that etcd leaked credentials when debugging was enabled. This allowed remote attackers to discover etcd authentication credentials and possibly escalate privileges […]

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CentOS Stream 9 — tpm2-tss — vulnerability — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — tpm2-tss — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 22 April 2023 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2023:6685 Related CVEs: CVE-2023-22745 Upstream summary: The tpm2-tss packages provide the Intel implementation of the Trusted Platform Module (TPM) 2.0 System API library. This library enables programs to interact with TPM […]

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openSUSE Tumbleweed — ctags — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — ctags — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2023:1095-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-4515 CVE-2014-7204 Upstream summary: A flaw was found in Exuberant Ctags in the way it handles the "-o" option. This option specifies the tag filename. […]

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IBM AIX 7.3 — CVE-2016-3053 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.3

IBM AIX 7.3 — CVE-2016-3053 — vulnerability — patch and remediation guide

🟠 High   ⏱ 30–90 min  Last verified: 22 April 2023 Affected versions: IBM AIX 7.3 📖 ~4 min read  •  Source: NVD CVE-2016-3053, IBM Support Bulletin CVE: CVE-2016-3053 NVD summary: IBM AIX contains an unspecified vulnerability that would allow a locally authenticated user to obtain root level privileges. References: aix.software.ibm.com/aix/efixes/security/lsmcode   www.securityfocus.com/bid/93605   www.securitytracker.com/id/1037030 […]

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How to Set Up Windows Server 2022 Network Controller — step-by-step Windows Server 2022 tutorial on Progressive Robot

How to Set Up Windows Server 2022 Network Controller

Introduction to Blue-Green Deployment on Windows Server 2022 Blue-green deployment is a release technique that maintains two identical production environments — one active (blue), one idle (green). A new version is deployed to the idle environment, validated, and then traffic is switched instantly from blue to green. If anything goes wrong after the switch, traffic […]

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Windows Server 2016 — KB5027223 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5027223 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5027223 • MSRC update-guide entry Related CVEs: CVE-2023-29363 CVE-2023-32014 CVE-2023-32015 CVE-2023-29346 CVE-2023-29351 CVE-2023-29358 CVE-2023-29359 CVE-2023-29360  +12 more Affected components: Windows Server 2016 Table of contents Symptom & Impact Environment & Reproduction Root […]

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Oracle Linux 9 — tomcat — security and stability fixes — required update — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — tomcat — security and stability fixes — required update (ELSA-2023-6570)

🟡 Medium   ⏱ 10–30 min  Last verified: 21 April 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-6570 Related CVEs: CVE-2023-28708 CVE-2023-28709 CVE-2023-24998 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 117944

Ubuntu 18.04 drops to GRUB rescue prompt

🟡 Medium   ⏱ 5–30 min  Last verified: 21 April 2023 📖 ~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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Alpine Linux edge — tinyssh — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — tinyssh — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 20230101-r3 📖 ~4 min read  •  Source: Alpine secdb entry — tinyssh 20230101-r3 Related CVEs: CVE-2023-48795 Upstream summary: Alpine community repository for vedge ships tinyssh 20230101-r3 which addresses CVE-2023-48795. Table of contents Symptom & Impact Environment […]

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How to Monitor System Resources on Oracle Linux 9 — step-by-step Oracle Linux 9 tutorial on Progressive Robot

How to Monitor System Resources on Oracle Linux 9

Introduction How to Monitor System Resources on Oracle Linux 9 on Oracle Linux 9 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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