November 2019 - Page 43 of 66

Common Problems 121588

Fail2ban Blocking Trusted Internal Addresses

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 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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FreeBSD 12 — pypy — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — pypy — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Python — DoS via malformed XML-RPC / HTTP POST request Related CVEs: CVE-2012-0845 Upstream summary: Jan Lieskovsky reports, A denial of service flaw was found in the way Simple XML-RPC […]

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How to Set Up Nginx Load Balancing on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Set Up Nginx Load Balancing on SLES 12

Introduction This tutorial covers How to Set Up Nginx Load Balancing on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 12 system is up to date: […]

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Common Problems 118924

Ubuntu 14.04 LTS Boot Drops to initramfs Prompt

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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 & Cross-Refs References & Further […]

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Common Problems 114481

SSHD Access Denied After Hardening Changes

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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 & Cross-Refs References & Further […]

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FreeBSD 12 — gitolite — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — gitolite — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: gitolite — path traversal vulnerability Related CVEs: CVE-2012-4506 Upstream summary: Sitaram Chamarty reports: I'm sorry to say there is a potential path traversal vulnerability in v3. Thanks to Stephane Chazelas […]

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Java Collections sort() — step-by-step Programming tutorial on Progressive Robot

Java Collections sort()

URL: https://www.progressiverobot.com/java-collections-sort/ Today we will look into Java Collections sort method. While working with [Collections in java](/community/tutorials/collections-in-java-tutorial), more than often we need to sort the data. Java Collections sort() Java Collections class provides us with a very convenient method Collections.sort() to sort all [List](/community/tutorials/java-list) implementations such as [LinkedList](/community/tutorials/java-linkedlist-linkedlist-java) and [ArrayList](/community/tutorials/java-arraylist). There are two overloaded Collections.sort() […]

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How to Configure Consul for Service Discovery on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure Consul for Service Discovery on FreeBSD 12

Introduction How to Configure Consul for Service Discovery on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for […]

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How To Share Data between Docker Containers — step-by-step Docker tutorial on Progressive Robot

How To Share Data between Docker Containers

In general, Docker containers are ephemeral, running just as long as it takes for the command issued in the container to complete. Sometimes, however, applications need to share access to data or persist data after a container is deleted. In this article, we’ll look at four different ways to share data between containers.

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