Linux

Common Problems 118611

Ubuntu 16.04 LTS – severe time drift causes TLS and token failures – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 4 October 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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Gentoo Linux — net-dns/libidn2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-dns/libidn2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202003-63 Related CVEs: CVE-2019-12290 CVE-2019-18224 Upstream summary: Multiple vulnerabilities have been discovered in GNU IDN Library 2. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact […]

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如何在Ubuntu 18.04服务器上安装Python 3并建立本地编程环境 — step-by-step Linux tutorial on Progressive Robot

如何在Ubuntu 18.04服务器上安装Python 3并建立本地编程环境

Python是一种灵活多样的编程语言。它的用途广泛,在脚本、自动化、数据分析、机器学习和后端开发方面都具有优势。Python于1991年首次发行,名字的灵感来源于英国喜剧团体”Monty Python”,因此Python开发团队希望让Python用起来很有趣。易于安装配置、代码风格相对简单直接、有即时的反馈和报错,这些特性让Python成为编程初学者的一个很好选择,也同样适合有经验的程序员。[Python…

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SaltStack Infrastructure: Installing the Salt Master — step-by-step Linux tutorial on Progressive Robot

SaltStack Infrastructure: Installing the Salt Master

In this article, we’ll introduce the various environments we’ll be building out and install the Salt master daemon onto our primary server. This is the core system that will house our configuration instructions, control our infrastructure nodes, and manage our requirements.

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How To Install Apache Tomcat 7 on Ubuntu 14.04 via Apt-Get — step-by-step Linux tutorial on Progressive Robot

How To Install Apache Tomcat 7 on Ubuntu 14.04 via Apt-Get

Apache Tomcat is a web server and servlet container that is used to serve Java applications. Tomcat is an open source implementation of the Java Servlet and JavaServer Pages technologies, released by the Apache Software Foundation. This tutorial covers the basic installation and some configuration of Tomcat 7.0.x on Ubuntu 14.04.

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How to Set Up a Kubernetes Dashboard on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up a Kubernetes Dashboard on RHEL 8

The Kubernetes Dashboard is a web-based UI that gives cluster operators a visual overview of workloads, services, namespaces, and resource utilization without dropping into kubectl for every task. On RHEL 8 with a running Kubernetes cluster, deploying the dashboard takes only a few kubectl commands. This tutorial covers installation, creating a service account with the […]

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Alpine Linux edge — qpdf — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — qpdf — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 7.0.0-r0 📖 ~4 min read  •  Source: Alpine secdb entry — qpdf 7.0.0-r0 Related CVEs: CVE-2017-9208 CVE-2017-9209 CVE-2017-9210 CVE-2017-11624 CVE-2017-11625 CVE-2017-11626 CVE-2017-11627 CVE-2017-12595  +1 more Upstream summary: Alpine community repository for vedge ships qpdf 7.0.0-r0 which […]

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How To Install and Secure phpMyAdmin with Apache on a CentOS 7 Server — step-by-step Linux tutorial on Progressive Robot

How To Install and Secure phpMyAdmin with Apache on a CentOS 7 Server

While many users require access to a database management system like MySQL or MariaDB, not all users feel comfortable interacting with the SQL prompt on a daily basis. In this guide, we’ll discuss how to install and secure phpMyAdmin, a web management interface for MySQL and MariaDB, on a CentOS 7 server. We will leverage the Apache web server for this guide.

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Common Problems 114918

RHEL 8 Service Fails to Start Because of Dependency Ordering

🟡 Medium   ⏱ 5–30 min  Last verified: 3 October 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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SLES 15 — jakarta-commons-fileupload — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — jakarta-commons-fileupload — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 3 October 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2016:2188-1 (see also SUSE bugzilla) Related CVEs: CVE-2016-3092 CVE-2016-1000031 Upstream summary: The MultipartStream class in Apache Commons Fileupload before 1.3.2, as used in Apache Tomcat 7.x before 7.0.70, 8.x before 8.0.36, 8.5.x […]

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