Linux

How to Configure MySQL InnoDB Tuning on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure MySQL InnoDB Tuning on Debian 10

Introduction Deploying configure mysql innodb tuning on debian 10 on a Debian 10 Buster 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 You will […]

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Oracle Linux 8 — nghttp2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — nghttp2 — vulnerability — patch and remediation guide (ELSA-2019-2692)

🟠 High   ⏱ 15–60 min  Last verified: 1 June 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-2692 Related CVEs: CVE-2019-9513 CVE-2019-9511 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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What are the Different Types of Shells in Linux? — step-by-step Linux tutorial on Progressive Robot

What are the Different Types of Shells in Linux?

Discover the essentials of Linux shells in our comprehensive tutorial. Learn what a shell is, is importance, and explore various types of Linux shells including Bourne, Bash, C, Korn and Z shell.Understand their unique properties and functions to determine the best shell for your specific task.

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How to Write Ansible Playbooks for Server Automation on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Write Ansible Playbooks for Server Automation on RHEL 8

Once you have Ansible installed and your inventory configured, playbooks are the primary way to describe and enforce the desired state of your infrastructure. A playbook is a YAML file that groups one or more plays, each targeting a set of hosts and executing an ordered list of tasks. This tutorial covers playbook anatomy, the […]

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Common Problems 121030

Debian 10 – nftables Rules Missing After Reboot – Persistent Firewall Setup

🟠 High   ⏱ 5–30 min  Last verified: 31 May 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 & […]

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Common Problems 118047

Ubuntu 18.04 Docker Containers Lose DNS After Restart

🟡 Medium   ⏱ 5–30 min  Last verified: 31 May 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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Common Problems 117467

Ubuntu 20.04 LTS – UFW blocks required application ports after policy tighten – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 31 May 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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