Linux

How To Set Up SSH Keys on Ubuntu 12.04 — step-by-step Linux tutorial on Progressive Robot

How To Set Up SSH Keys on Ubuntu 12.04

SSH keys provide a more secure method of logging into a server than using a password. With SSH keys, users can log into a server without a password. This tutorial explains how to generate, upload, and use an SSH key pair, and optionally how to disable password-based SSH authentication.

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How to Manage Docker Images and Containers on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Manage Docker Images and Containers on RHEL 8

Day-to-day Docker work revolves around a core set of commands for pulling images from registries, starting and stopping containers, reading logs, and cleaning up unused resources. Mastering these commands on RHEL 8 means you can confidently deploy, debug, and maintain containerized applications without relying on GUI tools. This tutorial covers the full lifecycle from pulling […]

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How To Secure Apache with Let's Encrypt on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Secure Apache with Let’s Encrypt on Ubuntu 14.04

This tutorial will show you how to set up a free TLS/SSL certificate from Let’s Encrypt on a Ubuntu 14.04 server running Apache as web server. SSL certificates are used within web servers to encrypt the traffic between server and client, providing extra security for users accessing your application.

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How To Host a Website Using Cloudflare and Nginx on Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

How To Host a Website Using Cloudflare and Nginx on Ubuntu 20.04

In this tutorial you will secure your website served by Nginx with an Origin CA certificate from Cloudflare and configure Nginx to use authenticated pull requests. The advantages of using this setup are that you benefit from Cloudflare’s CDN and fast DNS resolution while ensuring that all connections pass through Cloudflare. This prevents any malicious requests from reaching your server.

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Debian 10 — freeimage — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — freeimage — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 December 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-12211 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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Oracle Linux 8 — postgresql:10 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — postgresql:10 — security and stability fixes — required update (ELSA-2020-3669)

🟡 Medium   ⏱ 10–30 min  Last verified: 24 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-3669 Related CVEs: CVE-2019-10164 CVE-2019-10208 CVE-2020-14350 CVE-2019-10130 CVE-2020-14349 CVE-2020-1720 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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

Oracle Linux 8 — firefox — vulnerability — patch and remediation guide (ELSA-2020-5237)

🟠 High   ⏱ 15–60 min  Last verified: 24 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5237 Related CVEs: CVE-2020-26951 CVE-2020-26953 CVE-2020-26965 CVE-2020-26968 CVE-2020-16012 CVE-2020-26960 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 121651

Debian 9 – PostgreSQL Fails Because WAL Partition Is Full – Immediate Recovery

🔴 Critical   ⏱ 5–30 min  Last verified: 24 December 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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Common Problems 115489

RHEL 7 NFS mount fails during boot because network dependency ordering is wrong

🟠 High   ⏱ 5–30 min  Last verified: 24 December 2020 Affected versions: RHEL 7 📖 ~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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