Logging Monitoring

How to Monitor LPAR Resources with lparstat on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Monitor LPAR Resources with lparstat 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 monitor lpar resources with lparstat on ibm aix 7.2 […]

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SLES 15 — iscsiuio — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — iscsiuio — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 19 July 2020 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2021:233-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-13987 CVE-2020-13988 CVE-2020-17437 CVE-2020-17438 Upstream summary: An issue was discovered in Contiki through 3.0. An Out-of-Bounds Read vulnerability exists in the uIP TCP/IP Stack component […]

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How to Configure Swap Space on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Swap Space on Debian 10

Introduction This guide explains how to Configure Swap Space on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the standard […]

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How to Set Up Loki and Promtail for Log Aggregation on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up Loki and Promtail for Log Aggregation on RHEL 7

How to Set Up Loki and Promtail for Log Aggregation on RHEL 7 Loki is a horizontally scalable, highly available log aggregation system developed by Grafana Labs. Unlike traditional log management solutions that index the full text of every log line, Loki indexes only the metadata labels attached to each log stream. This makes it […]

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Common Problems 115065

RHEL 8 tuned Profile Mismatch Causes Performance Drop

🟡 Medium   ⏱ 5–30 min  Last verified: 18 July 2020 📖 ~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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How to Use AIX Live Update on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use AIX Live Update on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use aix live update on ibm aix 7.1 on […]

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openSUSE Tumbleweed — axel — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — axel — 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-2020:0778-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-13614 Upstream summary: An issue was discovered in ssl.c in Axel before 2.17.8. The TLS implementation lacks hostname verification. Table of contents Symptom & Impact […]

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Ubuntu 16.04 — libvncserver — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — libvncserver — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 18 July 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4636-1 Related CVEs: CVE-2020-25708 CVE-2019-20839 CVE-2019-20840 CVE-2020-14396 CVE-2020-14397 CVE-2020-14398 CVE-2020-14399 CVE-2020-14400  +12 more Upstream summary: It was discovered that LibVNCServer incorrectly handled certain internals. An attacker could possibly use this […]

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Oracle Linux 8 — unbound — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — unbound — vulnerability — patch and remediation guide (ELSA-2020-1716)

🟡 Medium   ⏱ 10–30 min  Last verified: 18 July 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1716 Related CVEs: CVE-2019-18934 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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