Visual Studio CodeでPrettierを使用してコードをフォーマットする方法
コーディングスタイルを整えるのは骨の折れる作業ですが、Prettierのような開発ツールを使用すれば、チームのコードベースの一貫性を自動的に保てます。
How To Declare Values For Multiple Properties In a CSS Rule
In this tutorial, you will learn how to declare values for multiple properties in a CSS rule so that you can modify selector properties like color, size, and font all at once.
How to Install Java (OpenJDK) on RHEL 8
Java is one of the most widely used programming languages in enterprise software, and RHEL 8 makes it straightforward to install and manage multiple Java versions through its built-in package manager. Whether you are building web applications, microservices, or command-line tools, having a proper Java development environment is the first step. In this tutorial you […]
Debian 9: SSH access denied after sshd Match rule change
🔴 Critical ⏱ 5–30 min Last verified: 22 August 2019 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 & […]
RHEL 8 rsyslog cannot forward logs over TLS
🟡 Medium ⏱ 5–30 min Last verified: 22 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 […]
How to Configure Apache2 MPM Worker on Debian 9
Introduction Deploying configure apache2 mpm worker on debian 9 on a Debian 9 Stretch machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Ensure Debian […]
RHEL 8 sudo Commands Pause for DNS Lookup Delays
🟡 Medium ⏱ 5–30 min Last verified: 22 August 2019 Affected versions: 8.4 8.5 8.6 8.7 8.8 8.9 8.10 📖 ~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 […]
Windows Server 2012 R2 — Credential Manager service vault access errors — Fix & Prevention
🟠 High ⏱ 5–30 min Last verified: 22 August 2019 Affected versions: Windows Server 2012 R2 📖 ~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 […]
How to Configure Simultaneous Multithreading (SMT) on IBM AIX 7.2
Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure simultaneous multithreading (smt) on ibm aix 7.2 on […]
openSUSE Tumbleweed — btrfsmaintenance — vulnerability — 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-2018-14722 Upstream summary: An issue was discovered in evaluate_auto_mountpoint in btrfsmaintenance-functions in btrfsmaintenance through 0.4.1. Code execution as root can occur via a specially crafted […]