Linux

Common Problems 117488

Ubuntu 20.04 LTS – GRUB rescue prompt shows unknown filesystem

🔴 Critical   ⏱ 5–30 min  Last verified: 26 November 2020 Affected versions: Ubuntu 20.04 LTS Ubuntu 20.04 Ubuntu 20.04.6 📖 ~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 […]

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SLES 15 — velocity — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — velocity — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 26 November 2020 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:0800-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-13936 Upstream summary: An attacker that is able to modify Velocity templates may execute arbitrary Java code or run arbitrary system commands with the same […]

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How To Install and Secure phpMyAdmin on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install and Secure phpMyAdmin on Ubuntu 16.04

While many users require access to a database management system like MySQL, not all users feel comfortable interacting with the MySQL prompt on a daily basis. In this guide, we’ll discuss how to install and secure phpMyAdmin, a web management interface for MySQL, on an Ubuntu 16.04 server.

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Como Instalar o MySQL no Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

Como Instalar o MySQL no Ubuntu 18.04

Não está usando o Ubuntu 18.04? Escolha uma versão diferente: Uma versão anterior desse tutorial foi escrita por Hazel Virdó MySQL é um sistema de gerenciamento de banco de dados…

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How to Install and Configure Dovecot IMAP Server on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install and Configure Dovecot IMAP Server on RHEL 8

Dovecot is a high-performance, secure IMAP and POP3 server that works seamlessly alongside Postfix to deliver a complete mail server stack on RHEL 8. While Postfix handles sending and receiving mail via SMTP, Dovecot allows mail clients like Thunderbird or Outlook to retrieve messages using IMAP or POP3. Dovecot is also SELinux-aware and actively maintained, […]

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

Oracle Linux 8 — samba security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-1878)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-1878 Related CVEs: CVE-2019-10197 CVE-2019-14907 CVE-2019-10218 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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Common Problems 121511

Debian 9 – Network Interface Rename Breaks Connectivity – Persistent Naming Fix

🟠 High   ⏱ 5–30 min  Last verified: 25 November 2020 Affected versions: Debian 9 📖 ~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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Arch Linux — lldpd — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — lldpd — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202101-29 Related CVEs: CVE-2020-27827 Upstream summary: Type: information disclosure. Status: Fixed. Affected: 1.0.7-1. Fixed in: 1.0.8-1. Group: AVG-1451. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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