Package Management

How to Set Up Oracle Linux 8 in AWS — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Oracle Linux 8 in AWS

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up oracle linux 8 in aws both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up Oracle Linux 8 in AWS, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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How to Configure Docker Networks on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Docker Networks on Debian 9

Introduction Deploying configure docker networks on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Before you begin, […]

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Oracle Linux 8 — tcpdump security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — tcpdump security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-4760)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4760 Related CVEs: CVE-2018-10103 CVE-2018-14879 CVE-2018-16451 CVE-2018-14882 CVE-2018-16228 CVE-2018-14467 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 118939

Ubuntu 14.04 LTS DNS Resolution Intermittently Fails

🟡 Medium   ⏱ 5–30 min  Last verified: 24 November 2020 Affected versions: 14.04 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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How to Use lssrc, startsrc, and stopsrc on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use lssrc, startsrc, and stopsrc 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 lssrc, startsrc, and stopsrc on ibm aix 7.1 […]

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How to Set Up X11 Forwarding on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Set Up X11 Forwarding 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 set up x11 forwarding on ibm aix 7.2 on […]

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How to Set Up NFS High Availability on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Set Up NFS High Availability on SLES 12

Introduction This tutorial covers How to Set Up NFS High Availability on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Step 1 — Install NFS Server zypper install -y nfs-kernel-server […]

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How to Configure Network Interfaces on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure Network Interfaces 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 network interfaces on ibm aix 7.2 on IBM […]

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Ubuntu 18.04 — python-py — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — python-py — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 November 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5138-1 Related CVEs: CVE-2020-29651 Upstream summary: The py.path.svnwc component of py (aka python-py) through v1.9.0 contains a regular expression with an ambiguous subpattern that is susceptible to catastrophic backtracing. This […]

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Ubuntu 16.04 — libjpeg6b — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — libjpeg6b — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 24 November 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5497-2 Related CVEs: CVE-2018-11212 CVE-2018-11213 CVE-2018-11214 CVE-2018-11813 CVE-2020-14152 Upstream summary: USN-5497-1 fixed vulnerabilities in Libjpeg6b. This update provides the corresponding updates for Ubuntu 16.04 ESM. Original advisory details: It was […]

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