Package Management

How to Enable Brotli and Gzip Compression in Nginx on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Enable Brotli and Gzip Compression in Nginx on RHEL 7

How to Enable Brotli and Gzip Compression in Nginx on RHEL 7 Compression is one of the highest-return optimizations available for web servers: it requires minimal CPU investment but can reduce text-based response sizes by 60–80%, directly improving page load times and reducing bandwidth costs. Nginx ships with the ngx_http_gzip_module built in and available on […]

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IBM AIX 7.2 — CVE-2022-22496 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2022-22496 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 18 December 2022 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2022-22496, IBM Support Bulletin CVE: CVE-2022-22496 NVD summary: While a user account for the IBM Spectrum Protect Server 8.1.0.000 through 8.1.14 is being established, it may be configured to use SESSIONSECURITY=TRANSITIONAL. While […]

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Common Problems 116921

Ubuntu 22.04 LTS – apt lock contention from unattended-upgrades blocks installs – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 18 December 2022 Affected versions: Ubuntu 22.04 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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Debian 11 — jquery-minicolors — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — jquery-minicolors — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-32850 Upstream summary: jQuery MiniColors is a color picker built on jQuery. Prior to version 2.3.6, jQuery MiniColors is prone to cross-site scripting when handling untrusted color names. […]

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Common Problems 115417

RPM Database Corruption Breaks Package Operations

🟡 Medium   ⏱ 5–30 min  Last verified: 18 December 2022 📖 ~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 — ruby-faye-websocket — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ruby-faye-websocket — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-15133 Upstream summary: In faye-websocket before version 0.11.0, there is a lack of certification validation in TLS handshakes. The `Faye::WebSocket::Client` class uses the `EM::Connection#start_tls` method in EventMachine to […]

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How to Use Puppet Agent on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Use Puppet Agent 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 use puppet agent on IBM AIX 7.3 with practical […]

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

Debian 11 — logcheck — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 December 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2004-0404 Upstream summary: logcheck before 1.1.1 allows local users to overwrite arbitrary files via a symlink attack on a temporary directory in /var/tmp. Table of contents Symptom & […]

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