How To Install and Use Docker on Ubuntu
Install Docker on Ubuntu servers. Learn repository setup, container management, and Docker commands for Ubuntu servers.
How to Ensure Cluster Reliability with ChaosMesh on Kubernetes
*The author selected Free and Open Source Fund to receive a donation as part of the Write for DOnations program.* Introduction By itself, Kubernetes strives to provide a resilient and scalable platform for hosting applications and workloads. When faults occur, it automatically tries to repair them to keep the cluster and its deployments in the […]
Height of Binary Tree in C/C++
The height of a Binary Tree is defined as the maximum depth of any leaf node from the root node. That is, it is the length of the longest path from the root node to any leaf node. Let us consider the below Binary Tree. Since the leaf nodes corresponding to the maximum depth are […]
Como Instalar e Usar o Composer no Ubuntu 18.04
Uma versão anterior desse tutorial foi escrito por Brennen Bearnes. O Composer é uma ferramenta popular de gerenciamento de dependências para o PHP, criado principalmente para facilitar a…
NVIDIA Driver Upgrade Causes Black Screen on Ubuntu 14.04
🟡 Medium ⏱ 5–30 min Last verified: 15 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 […]
AppArmor Denials Break Application Behavior
🟡 Medium ⏱ 5–30 min Last verified: 15 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 […]
RHEL 7 yum Metadata Expired Behind Proxy
🟡 Medium ⏱ 5–30 min Last verified: 15 August 2020 Affected versions: RHEL 7 📖 ~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 Apache httpd Fails To Start Because Port Already In Use
🟡 Medium ⏱ 5–30 min Last verified: 15 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 […]
How to Set Up NFS 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 set up nfs on ibm aix 7.2 on IBM […]
How to Secure Apache with Let’s Encrypt on SLES 12
Introduction This tutorial covers How to Secure Apache with Let’s Encrypt 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: […]