2020 - Page 87 of 735

Installing and Using Ranger, a Terminal File Manager, on a Ubuntu VPS — step-by-step Linux tutorial on Progressive Robot

Installing and Using Ranger, a Terminal File Manager, on a Ubuntu VPS

This tutorial will cover how to install and use ranger, a terminal file manager. Ranger is a file management application that can be used from within a terminal window to traverse the file hierarchy and manipulate files within a simple, visually appealing interface. Ranger uses vi-like keybindings to perform many of its operations.

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How To Write Comments in JavaScript — step-by-step Javascript tutorial on Progressive Robot

How To Write Comments in JavaScript

JavaScript comments are annotations in the source code of a program that are ignored by the interpreter, and therefore have no effect on the actual output of the code. Comments can be immensely helpful in explaining the intent of what your code is or should be doing.

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How To Set Up SSH Keys on CentOS 7 — step-by-step Linux tutorial on Progressive Robot

How To Set Up SSH Keys on CentOS 7

SSH-key-based authentication provides a more secure alternative to password-based authentication. In this tutorial we’ll learn how to set up SSH-key-based authentication on a CentOS 7 installation.

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How To Monitor Hosts and Services with Icinga on Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

How To Monitor Hosts and Services with Icinga on Ubuntu 16.04

Icinga is an open-source monitoring system used to monitor the health of networked hosts and services. In this tutorial we will use Icinga to set up two different kinds of monitoring configurations, remote service checks and the Icinga agent-based “Top Down Command Endpoint” mode.

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How to Set Up ArgoCD for GitOps on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up ArgoCD for GitOps on RHEL 8

ArgoCD implements the GitOps pattern for Kubernetes by continuously reconciling the live state of your cluster with manifests stored in a Git repository. Running on RHEL 8, you interact with ArgoCD through its CLI, its web UI, or both, while a controller inside the cluster watches for drift and can automatically correct it. This tutorial […]

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Common Problems 117426

Ubuntu 20.04 LTS – DNS resolution fails with systemd-resolved stub issues – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 17 November 2020 Affected versions: Ubuntu 20.04 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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Oracle Linux 8 — kernel security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-1988)

🟠 High   ⏱ 15–60 min  Last verified: 17 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-1988 Related CVEs: CVE-2022-0286 CVE-2022-0322 CVE-2020-0404 CVE-2022-1011 CVE-2020-4788 CVE-2021-21781 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 115617

systemctl Cannot Start Due to Missing Environment File

🟡 Medium   ⏱ 5–30 min  Last verified: 17 November 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 […]

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