Linux

How To Install and Configure Nextcloud on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install and Configure Nextcloud on Ubuntu 16.04

Nextcloud is fork of ownCloud, a file sharing server that permits you to store your personal content, like documents and pictures, in a centralized location, much like Dropbox. The difference with Nextcloud is that all of its features are open-source. It also returns the…

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SLES 12 — libexif12 — multiple vulnerabilities (19 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — libexif12 — multiple vulnerabilities (19 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:1534-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-13112 CVE-2020-0452 CVE-2019-9278 CVE-2020-13113 CVE-2020-0181 CVE-2020-0198 CVE-2020-0093 CVE-2020-12767  +11 more Upstream summary: An issue was discovered in libexif before 0.6.22. Several buffer over-reads in EXIF […]

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Oracle Linux 8 — bind — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — bind — security and stability fixes — required update (ELSA-2021-4384)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4384 Related CVEs: CVE-2021-25214 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 117892

Ubuntu 18.04 LTS Stuck at GRUB Prompt After Upgrade

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: 18.04 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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AlmaLinux 8 — rpm-mpi-hooks — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — rpm-mpi-hooks — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2021:4412 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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AlmaLinux 8 — libcap-ng — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — libcap-ng — 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-2021:4434 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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Arch Linux — go — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — go — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202011-16 Related CVEs: CVE-2020-28367 CVE-2020-28366 CVE-2020-28362 CVE-2018-16875 CVE-2018-16874 CVE-2018-16873 CVE-2018-6574 CVE-2017-15041  +12 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 2:1.15.4-1. Fixed in: 2:1.15.5-1. Group: AVG-1278. Table of contents […]

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Ubuntu 18.04 — keystone — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — keystone — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4480-1 Related CVEs: CVE-2020-12689 CVE-2020-12690 CVE-2020-12691 CVE-2020-12692 Upstream summary: It was discovered that OpenStack Keystone incorrectly handled EC2 credentials. An authenticated attacker with a limited scope could possibly create EC2 […]

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How to Configure Btrfs File System on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Btrfs File System on Debian 9

Introduction How to Configure Btrfs File System on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. […]

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