GraphQL Subscriptions in Angular using Apollo 2.0
A quick look at implementing GraphQL subscriptions in an Angular 2+ app using the Apollo 2.0 client.
How to Configure GitLab CI/CD Pipelines on RHEL 8
GitLab CI/CD is built directly into the GitLab platform, making it straightforward to automate builds, tests, and deployments without installing a separate CI server. Pipelines are defined in a .gitlab-ci.yml file committed to your repository, and they execute on GitLab Runners — lightweight agents that can run on bare metal, virtual machines, or inside Docker […]
Oracle Linux 8 — dovecot — security and stability fixes — required update (ELSA-2021-1887)
🟡 Medium ⏱ 10–30 min Last verified: 19 December 2020 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2021-1887 Related CVEs: CVE-2020-24386 CVE-2020-25275 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]
Ubuntu 14.04 LTS excessive swap usage causes severe slowdown
🟡 Medium ⏱ 5–30 min Last verified: 19 December 2020 Affected versions: 14.04 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 & […]
RHEL 7 – yum-cron Service Not Applying Scheduled Security Updates
🟡 Medium ⏱ 5–30 min Last verified: 19 December 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 […]
openSUSE Tumbleweed — perl-DBI — multiple vulnerabilities (5 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory openSUSE-SU-2020:1620-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-20919 CVE-2020-14392 CVE-2020-14393 CVE-2014-10401 CVE-2014-10402 Upstream summary: An issue was discovered in the DBI module before 1.643 for Perl. The hv_fetch() documentation requires checking for […]
How to Set Up ClamAV Antivirus on SLES 12
Introduction This tutorial covers How to Set Up ClamAV Antivirus 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: zypper […]
Windows Server 2016 – Storage Replica initial sync never completes – Fix & Prevention (FIX-PREVENTION-2)
🟠 High ⏱ 5–30 min Last verified: 19 December 2020 Affected versions: Windows Server 2016 📖 ~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 iSCSI Storage 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 iscsi storage on ibm aix 7.2 on IBM […]
Adding a Chatbot to Your WordPress Website Using the cloud provider Gradient Platform
In this tutorial, you will learn how to add a chatbot to your WordPress website using the cloud provider’s Gradient platform.