Linux

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

Oracle Linux 8 — tcpdump — vulnerability — patch and remediation guide (ELSA-2020-1604)

🟢 Low   ⏱ 5–15 min  Last verified: 22 March 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1604 Related CVEs: CVE-2018-19519 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
Como instalar e configurar a VNC no Debian 9 — step-by-step Linux tutorial on Progressive Robot

Como instalar e configurar a VNC no Debian 9

O Virtual Network Computing, ou VNC, é um sistema de conexão que permite que você use seu teclado e mouse para interagir com um ambiente gráfico da área de trabalho em um servidor remoto. Isso facilita o gerenciamento de arquivos, software e configurações em um servidor remoto…

Read more
How to Use Docker Secrets and Environment Variables Securely on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Use Docker Secrets and Environment Variables Securely on RHEL 7

How to Use Docker Secrets and Environment Variables Securely on RHEL 7 One of the most common security mistakes in containerised deployments is embedding sensitive values — database passwords, API keys, TLS certificates — directly inside Dockerfiles or baking them into image layers. Because Docker images are built as a stack of read-only layers, anything […]

Read more
Arch Linux — openvpn — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — openvpn — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201706-27 Related CVEs: CVE-2017-7521 CVE-2017-7520 CVE-2017-7512 CVE-2017-7508 CVE-2017-7479 CVE-2017-7478 CVE-2020-11810 CVE-2017-12166 Upstream summary: Type: multiple issues. Status: Fixed. Affected: 2.4.2-1. Fixed in: 2.4.3-1. Group: AVG-318. Table of contents Symptom & […]

Read more
Common Problems 121082

Debian 10 – UFW policy blocks package downloads and outbound HTTPS

🟡 Medium   ⏱ 5–30 min  Last verified: 21 March 2020 Affected versions: Debian 10 📖 ~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 & […]

Read more
Arch Linux — pigeonhole — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — pigeonhole — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201908-19 Related CVEs: CVE-2019-11500 CVE-2020-28200 Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 0.5.7.1-1. Fixed in: 0.5.7.2-1. Group: AVG-1027. Table of contents Symptom & Impact Environment & Reproduction Root […]

Read more
Common Problems 118081

Ubuntu 18.04 Apache Service Fails with Config Test Error

🟡 Medium   ⏱ 5–30 min  Last verified: 21 March 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 […]

Read more
Ubuntu 16.04 — gthumb — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — gthumb — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 21 March 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5681-1 Related CVEs: CVE-2018-18718 CVE-2019-20326 CVE-2020-36427 Upstream summary: It was discovered that gThumb did not properly managed memory under certain circumstances. An attacker could possibly use this issue to cause […]

Read more
CHAT