Systemd Services

How to Set Up LUKS Disk Encryption on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up LUKS Disk Encryption on Oracle Linux 8

Introduction This tutorial demonstrates how to Set Up LUKS Disk Encryption on Oracle Linux 8 on Oracle Linux 8. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 8 system with […]

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Ubuntu 14.04 — libgd2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — libgd2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 12 February 2021 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5068-1 Related CVEs: CVE-2017-6363 CVE-2021-38115 CVE-2021-40145 CVE-2018-14553 CVE-2019-11038 CVE-2019-6977 CVE-2019-6978 CVE-2018-1000222  +12 more Upstream summary: It was discovered that GD Graphics Library incorrectly handled certain GD and GD2 files. An […]

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SLES 15 — zsh — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — zsh — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 12 February 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:0732-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-20044 CVE-2021-45444 CVE-2018-0502 CVE-2018-1100 CVE-2018-13259 CVE-2018-1083 CVE-2018-1071 Upstream summary: In Zsh before 5.8, attackers able to execute commands can regain privileges dropped by the –no-PRIVILEGED […]

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Gentoo Linux — mail-filter/postsrsd — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — mail-filter/postsrsd — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202107-08 Related CVEs: CVE-2020-35573 CVE-2021-35525 Upstream summary: Multiple vulnerabilities have been discovered in PostSRSd. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment & Reproduction […]

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How to Configure Prometheus Node Exporter on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Prometheus Node Exporter on RHEL 7

How to Configure Prometheus Node Exporter on RHEL 7 Prometheus Node Exporter is the de facto standard agent for exposing hardware and operating system metrics from Linux servers to a Prometheus monitoring server. It collects data on CPU usage, memory consumption, disk I/O, filesystem space, network traffic, running systemd services, and much more, all via […]

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

Oracle Linux 8 — freerdp and vinagre security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-4647)

🟡 Medium   ⏱ 10–30 min  Last verified: 11 February 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4647 Related CVEs: CVE-2020-11085 CVE-2020-11087 CVE-2020-11525 CVE-2020-11039 CVE-2020-11044 CVE-2020-11522 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 119129

Ubuntu 14.04 LTS Cron Jobs Not Running at Scheduled Times

🟡 Medium   ⏱ 5–30 min  Last verified: 11 February 2021 📖 ~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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Ubuntu 20.04 — golang-1.14 — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — golang-1.14 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 February 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4758-1 Related CVEs: CVE-2020-24553 Upstream summary: It was discovered that Go applications incorrectly handled uploaded content. If a user were tricked into visiting a malicious page, a remote attacker could […]

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How to Set Up SELinux MLS Policy on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up SELinux MLS Policy on Oracle Linux 8

Introduction Setting up set up selinux mls policy on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up SELinux MLS Policy on Oracle Linux 8, with all the commands you need, the SELinux and firewalld […]

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Gentoo Linux — sys-libs/binutils-libs — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — sys-libs/binutils-libs — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202208-30 Related CVEs: CVE-2021-3487 CVE-2021-3530 CVE-2021-3549 CVE-2021-20197 CVE-2021-20284 CVE-2021-20294 CVE-2021-45078 Upstream summary: Multiple vulnerabilities have been discovered in GNU Binutils. Please review the CVE identifiers referenced below for details. Table of contents […]

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