Designing for Humans With Design Thinking
How to use design thinking, a problem-solving process, to create innovative solutions for your users’ needs.
How to Set Up PostgreSQL Streaming Replication on RHEL 8
PostgreSQL streaming replication continuously ships Write-Ahead Log (WAL) records from a primary server to one or more standby replicas in near real time. The standby can serve as a warm failover target or, in hot-standby mode, accept read-only queries to offload reporting traffic from the primary. This tutorial configures a two-node streaming replication setup on […]
openSUSE Tumbleweed — nsd — multiple vulnerabilities (4 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2012-2979 CVE-2016-6173 CVE-2019-13207 CVE-2020-28935 Upstream summary: FreeBSD NSD before 3.2.13 allows remote attackers to crash a NSD child server process (SIGSEGV) and cause a denial […]
Debian 10 – sshd Fails to Start After Config Change – Fast Validation Workflow
🔴 Critical ⏱ 5–30 min Last verified: 27 February 2020 Affected versions: Debian 10 📖 ~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 & […]
How to Configure Samba on FreeBSD 12
Introduction How to Configure Samba 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 packet filtering, and […]
Ubuntu 14.04 LTS drops to initramfs BusyBox on boot
🟡 Medium ⏱ 5–30 min Last verified: 27 February 2020 📖 ~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 […]
Gentoo Linux — sys-libs/musl — vulnerability — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read • Source: Gentoo GLSA GLSA-202003-13 Related CVEs: CVE-2019-14697 Upstream summary: A flaw in musl libc’s arch-specific math assembly code for i386 was found which can lead to x87 stack overflow in the execution of subsequent math […]
Как установить Linux, Nginx, MySQL, PHP (LEMP) в Ubuntu 16.04
Стек LEMP представляет собой набор программного обеспечения, который используется для отображения динамических веб-страниц и веб-приложений. Этот акроним обозначает операционную систему Linux и веб-сервер Nginx. Данные при этом хранятся в базе данных MySQL, а динамическое…
How to Install VictoriaMetrics on FreeBSD 12
Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up install victoriametrics 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. This […]
Java 8 Features with Examples
Discover the powerful features of Java 8, including lambda expressions, streams, and method references. Enhance your Java programming with these modern additions.