Troubleshooting

Ubuntu 16.04 — file-roller — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — file-roller — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • March 9, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 9 March 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4927-1 Related CVEs: CVE-2020-36314 CVE-2020-11736 CVE-2019-16680 CVE-2016-7162 https://launchpad.net/bugs/1171236 Upstream summary: It was discovered that File Roller incorrectly handled symlinks. An attacker could possibly use this issue to expose sensitive information. […]

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How to Set Up IPv6 on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up IPv6 on FreeBSD 12

  • March 9, 2021
  • FreeBSD
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Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up ipv6 on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. […]

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Ubuntu 16.04 — libimage-exiftool-perl — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — libimage-exiftool-perl — vulnerability — patch and remediation guide

  • March 9, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 9 March 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4987-2 Related CVEs: CVE-2021-22204 Upstream summary: USN-4987-1 fixed a vulnerability in ExifTool. This update provides the corresponding update for Ubuntu 16.04 ESM. Original advisory details: It was discovered that ExifTool […]

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SLES 12 — gssproxy — vulnerability — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — gssproxy — vulnerability — patch and remediation guide

  • March 9, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 9 March 2021 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:1029-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-12658 Upstream summary: gssproxy (aka gss-proxy) before 0.8.3 does not unlock cond_mutex before pthread exit in gp_worker_main() in gp_workers.c. NOTE: An upstream comment states "We […]

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How to Configure Networking with /etc/network/interfaces on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Networking with /etc/network/interfaces on Debian 9

  • March 9, 2021
  • Linux
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Introduction Debian 9 Stretch is built around the ethos of stability and free software. Setting up configure networking with /etc/network/interfaces on debian 9 on Stretch leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Stretch freeze. Follow each step carefully and […]

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

Oracle Linux 8 — kernel — security and stability fixes — required update (ELSA-2020-3218)

  • March 8, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 8 March 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-3218 Related CVEs: CVE-2019-20908 CVE-2020-15780 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 121619

Debian 9 Kernel Upgrade Leaves Old Kernels Unmanaged

  • March 8, 2021
  • Linux
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🟢 Low   ⏱ 5–30 min  Last verified: 8 March 2021 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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Common Problems 118068

Ubuntu 18.04 LTS – snap refresh hangs and blocks package operations – Fix & Prevention

  • March 8, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 8 March 2021 Affected versions: Ubuntu 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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Common Problems 117446

Ubuntu 20.04 LTS – cloud-init overrides static networking unexpectedly – Fix & Prevention

  • March 8, 2021
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 8 March 2021 Affected versions: Ubuntu 20.04 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 Configure Kubernetes Ingress on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Kubernetes Ingress on Oracle Linux 8

Introduction This tutorial demonstrates how to Configure Kubernetes Ingress 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 the default […]

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