2020 - Page 301 of 735

How To Add Stimulus to a Ruby on Rails Application — step-by-step Javascript tutorial on Progressive Robot

How To Add Stimulus to a Ruby on Rails Application

In this tutorial, you will install and use Stimulus to build on an existing Rails application that offers readers information about sharks. The application already has a model for handling shark data, but you will add a nested resource for posts about individual sharks, allowing users to build out a body of thoughts and opinions about sharks. You will use Stimulus to manipulate the position and appearance of posts on the page.

Read more
Amazon Linux 2 — chrony — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — chrony — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2021-1575 Related CVEs: CVE-2020-14367 Upstream summary: A flaw was found in chrony when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still […]

Read more
How to Manage System Packages with dnf on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Manage System Packages with dnf on RHEL 8

DNF (Dandified YUM) is the default package manager on RHEL 8, replacing the older yum command with improved dependency resolution, transaction history, and modular package support through AppStream. Whether you are installing software, managing module streams, or adding third-party repositories like EPEL, dnf is the single tool for the job. This tutorial covers daily package […]

Read more
Common Problems 121060

Debian 10 – systemd Journal Consumes Disk Space – Retention and Vacuum Strategy

🟡 Medium   ⏱ 5–30 min  Last verified: 1 August 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 & […]

Read more
Common Problems 117528

Ubuntu 20.04 LTS – sudo reports unable to resolve host

🟡 Medium   ⏱ 5–30 min  Last verified: 1 August 2020 Affected versions: Ubuntu 20.04 LTS Ubuntu 20.04 Ubuntu 20.04.6 📖 ~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 […]

Read more
Common Problems 114963

RHEL 8 NFS mount hangs during boot sequence

🟡 Medium   ⏱ 5–30 min  Last verified: 1 August 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 […]

Read more
How to Configure GitLab CE on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure GitLab CE on Debian 10

Introduction This guide explains how to Configure GitLab CE on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with the standard […]

Read more
Common Problems 113508

Windows Server 2012 R2 — Monthly LCU Reappears as Needed After Successful Install — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 1 August 2020 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 […]

Read more
CHAT