IT, Cloud & DevOps Blog

How To Install Icinga and Icinga Web on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Install Icinga and Icinga Web on Ubuntu 16.04

Icinga is a flexible and powerful open-source monitoring system used to oversee the health of networked hosts and services. This tutorial will cover installing the Icinga core, its database backend, and the Icinga Web interface. Finally, we’ll set up email notification so you can receive alerts in your inbox when a service is misbehaving.

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How To Change Themes and Adjust Settings in Ghost — step-by-step Linux tutorial on Progressive Robot

How To Change Themes and Adjust Settings in Ghost

Ghost is a clean blogging platform that is focused on clear presentation and easy content creation. the cloud provider has a one-click Ghost installation image, which you can use to install Ghost on your VPS. In this guide, we will discuss how to edit themes and basic settings in Ghost.

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Common Problems 118402

Ubuntu 16.04 LTS – apt update fails with Release file not valid yet – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 31 August 2019 Affected versions: Ubuntu 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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Common Problems 118034

Ubuntu 18.04 failed to fetch updates from repositories

🟡 Medium   ⏱ 5–30 min  Last verified: 31 August 2019 📖 ~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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How to Configure LDAP Security on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure LDAP Security on Windows Server 2019

Introduction to LDAP Security LDAP (Lightweight Directory Access Protocol) is the protocol that applications use to query and modify Active Directory. By default, Windows Server 2019 domain controllers accept LDAP connections on port 389 without requiring signing or channel binding, making them vulnerable to man-in-the-middle attacks where an attacker can intercept and relay LDAP authentication. […]

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FreeBSD 12 — go-devel — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — go-devel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 August 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: go — invalid headers are normalized, allowing request smuggling Related CVEs: CVE-2019-16276 Upstream summary: The Go project reports: net/http (through net/textproto) used to accept and normalize invalid HTTP/1.1 headers with […]

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Java Queue – Queue in Java — step-by-step Programming tutorial on Progressive Robot

Java Queue – Queue in Java

URL: https://www.progressiverobot.com/java-queue/ Java Queue is an interface available in java.util package and extends java.util.Collection interface. Just like Java List, Java Queue is a collection of ordered elements (Or objects) but it performs insert and remove operations differently. We can use Queue to store elements before processing those elements. ![](images/java-queue-section-1.png) Java Queue In this section, we […]

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FreeBSD 12 — php5-imap — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — php5-imap — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 31 August 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: php-imap — Denial of Service Related CVEs: CVE-2007-0905 CVE-2007-0906 CVE-2007-0907 CVE-2007-0908 CVE-2007-0909 CVE-2007-0910 CVE-2007-0988 CVE-2007-1001  +1 more Upstream summary: The following DoS condition in IMAP extension was fixed in PHP […]

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Arch Linux — freeradius — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — freeradius — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201707-23 Related CVEs: CVE-2017-10987 CVE-2017-10986 CVE-2017-10985 CVE-2017-10984 CVE-2017-10983 CVE-2017-10978 CVE-2017-9148 Upstream summary: Type: multiple issues. Status: Fixed. Affected: 3.0.14-4. Fixed in: 3.0.15-1. Group: AVG-357. Table of contents Symptom & Impact […]

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