Cpu Memory

How to Install MariaDB on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install MariaDB on Debian 10 (DEBIAN-10-2)

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up install mariadb on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and the resulting […]

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Common Problems 117969

Ubuntu 18.04 LTS Swap Not Activating After Reboot

🟡 Medium   ⏱ 5–30 min  Last verified: 6 June 2020 Affected versions: 18.04 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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How to Set Up a Private Docker Registry on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up a Private Docker Registry on Debian 10

Introduction This guide explains how to Set Up a Private Docker Registry 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 […]

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How to Install Jenkins on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install Jenkins on RHEL 8

Jenkins is the most widely used open-source automation server for building, testing, and deploying software. On Red Hat Enterprise Linux 8, setting up Jenkins provides a stable CI foundation backed by enterprise-grade OS support. This tutorial walks through installing Jenkins on RHEL 8 using the official package repository, configuring the firewall, and completing the initial […]

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How to Configure Redis Sentinel on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Redis Sentinel on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up configure redis sentinel on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and the […]

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How to Install InfluxDB and Telegraf on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install InfluxDB and Telegraf on RHEL 8

InfluxDB 2.x is a purpose-built time-series database that stores metrics with nanosecond precision and exposes a powerful query language called Flux for aggregating and transforming that data. Telegraf is the official plugin-driven metrics collection agent from InfluxData — it ships over 200 input plugins covering everything from CPU and memory to Docker containers and SNMP […]

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How to Configure Percona XtraBackup on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Percona XtraBackup on Debian 10

Introduction How to Configure Percona XtraBackup on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. This […]

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Common Problems 118095

Ubuntu 18.04 LTS – swap usage stays high after memory pressure event

🟡 Medium   ⏱ 5–30 min  Last verified: 1 June 2020 Affected versions: Ubuntu 18.04 LTS Ubuntu 18.04 Ubuntu 18.04.6 📖 ~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 […]

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Common Problems 115011

RHEL 8 tuned Profile Misconfiguration Causing Latency Spikes

🟡 Medium   ⏱ 5–30 min  Last verified: 1 June 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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How to Configure Jail Networking on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure Jail Networking on FreeBSD 12

Introduction This guide explains how to Configure Jail Networking on FreeBSD 12 on FreeBSD 12. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained privilege […]

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