Linux

AlmaLinux 8 — network-manager-applet — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — network-manager-applet — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2022:1758 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Ubuntu 18.04 — libapache2-mod-auth-mellon — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libapache2-mod-auth-mellon — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 August 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5069-1 Related CVEs: CVE-2021-3639 CVE-2019-13038 CVE-2019-3877 CVE-2019-3878 Upstream summary: It was discovered that mod-auth-mellon incorrectly filtered certain URLs. A remote attacker could possibly use this issue to perform an open […]

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Oracle Linux 8 — lasso security and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — lasso security and — enhancement update — new behaviour and fixes (ELSA-2021-4325)

🟡 Medium   ⏱ 10–30 min  Last verified: 14 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4325 Related CVEs: CVE-2021-28091 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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Common Problems 118950

Ubuntu 14.04 LTS Network Interface Fails After ifupdown Edit

🟠 High   ⏱ 5–30 min  Last verified: 14 August 2021 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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Common Problems 118559

Ubuntu 16.04 LTS Expired GPG Keys Break apt Repositories

🟡 Medium   ⏱ 5–30 min  Last verified: 14 August 2021 Affected versions: 16.04 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 Install Postfix on CentOS 6 — step-by-step Linux tutorial on Progressive Robot

How To Install Postfix on CentOS 6

This tutorial explains how to install postfix and cyrus with yum, how to configure postfix, how to configure cyrus, how to install mailx, and how to send a test email. Postfix is free open source Mail Transfer Agent which works to route and deliver email.This tutorial should help you set up a mail server on a centos droplet.

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Cara Menginstal Linux, Nginx, MySQL, PHP (tumpukan LEMP) pada Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

Cara Menginstal Linux, Nginx, MySQL, PHP (tumpukan LEMP) pada Ubuntu 20.04

Tumpukan perangkat lunak LEMP adalah sekumpulan perangkat lunak yang dapat digunakan untuk menyajikan laman web dan aplikasi web dinamis yang ditulis dalam PHP. Ini adalah akronim yang mendeskripsikan suatu sistem operasi Linux, dengan server web Nginx (diucapkan seperti “Engine-X”). Data backend disimpan di dalam basis data MySQL, dan pemrosesan dinamis ditangani oleh PHP. Dalam panduan ini, kita akan menyiapkan tumpukan LEMP pada server Ubuntu 20.04.

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Alpine Linux edge — libtirpc — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — libtirpc — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.3.2-r2 📖 ~4 min read  •  Source: Alpine secdb entry — libtirpc 1.3.2-r2 Related CVEs: CVE-2021-46828 Upstream summary: Alpine main repository for vedge ships libtirpc 1.3.2-r2 which addresses CVE-2021-46828. Table of contents Symptom & Impact Environment […]

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