December 2022 - Page 45 of 72

Common Problems 114565

RHEL 9: Swap Not Activated at Boot

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026 📖 ~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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Debian 11 — tcp-wrappers — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — tcp-wrappers — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-4601 Upstream summary: A regression error in tcp-wrappers 7.6.dbs-10 and 7.6.dbs-11 might allow remote attackers to bypass intended access restrictions when a service uses libwrap but does not […]

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Debian 11 — razor — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — razor — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-2024 Upstream summary: Vipul Razor Agents (razor-agents) before 2.70 allows remote attackers to cause a denial of service via (1) certain "unusual HTML messages" or (2) "certain malformed […]

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How to Configure HACMP/PowerHA for High Availability on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Configure HACMP/PowerHA for High Availability on IBM AIX 7.3

Introduction IBM AIX 7.3 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 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure hacmp/powerha for high availability on IBM AIX 7.3 […]

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Debian 11 — libcgi-pm-perl — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libcgi-pm-perl — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2010-2761 CVE-2010-4410 CVE-2010-4411 CVE-2012-5526 Upstream summary: The multipart_init function in (1) CGI.pm before 3.50 and (2) Simple.pm in CGI::Simple 1.112 and earlier uses a hardcoded value of the […]

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Common Problems 111799

Windows Server 2022 — Firewall Rules Present but Inbound Application Traffic Still Blocked — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 18 May 2026 Affected versions: Windows Server 2022 📖 ~1 min read Table of contents Symptom & Impact Quick Checks Deep Diagnosis Primary Fix Verification Prevention & Hardening Symptom & Impact Applications remain unreachable despite visible allow rules in Windows Defender Firewall. Teams assume network outage while […]

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Debian 11 — ruby-openid — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ruby-openid — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-1812 CVE-2019-11027 Upstream summary: The ruby-openid gem before 2.2.2 for Ruby allows remote OpenID providers to cause a denial of service (CPU consumption) via (1) a large XRDS […]

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How To Schedule Routine Tasks With Cron and Anacron on a VPS — step-by-step Linux tutorial on Progressive Robot

How To Schedule Routine Tasks With Cron and Anacron on a VPS

Many tasks that you perform on a Linux server are repetitive and must be run at regular intervals. The cron and anacron utilities can be used to schedule tasks to run in the background at specific intervals. In this guide we will discuss the basics of how to use these two tools.

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Debian 11 — libgoogle-gson-java — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libgoogle-gson-java — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-25647 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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How To Install Ruby on Rails with rbenv on Ubuntu 22.04 — step-by-step Linux tutorial on Progressive Robot

How To Install Ruby on Rails with rbenv on Ubuntu 22.04

Ruby on Rails is one of the most popular application stacks for developers looking to create sites and web apps. Using rbenv will provide you with a solid environment for developing your Ruby on Rails applications as it will let you easily switch Ruby versions, keeping your entire team on the same version. In this tutorial, we will guide you through the Ruby and Rails installation processes with rbenv and gem.

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