Capacity Planning

Common Problems 117078

Ubuntu 22.04 LTS – no space left on device due to inode exhaustion – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 June 2022 Affected versions: Ubuntu 22.04 LTS (Jammy) 📖 ~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 […]

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Common Problems 117059

Ubuntu 22.04 LTS – swap is disabled and memory pressure triggers OOM kills

🟠 High   ⏱ 5–30 min  Last verified: 1 June 2022 Affected versions: Ubuntu 22.04 LTS Ubuntu 22.04 Ubuntu 22.04.4 📖 ~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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How to Set Up Checksum Monitoring with AIDE on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up Checksum Monitoring with AIDE on RHEL 8

AIDE (Advanced Intrusion Detection Environment) is a host-based intrusion detection tool that builds a cryptographic baseline of your filesystem and alerts you whenever files are added, removed, or modified. On RHEL 8 it is available in the base repositories and integrates cleanly with cron and email for automated daily checks. Unlike network-based intrusion detection, AIDE […]

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How to Install Ruby with rbenv on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install Ruby with rbenv on RHEL 8

Ruby is a dynamic, expressive language used widely for web development, scripting, and automation. On RHEL 8, the system repositories may offer an older Ruby version that does not suit modern projects. rbenv solves this by letting you install and switch between multiple Ruby versions per user without touching system files. This tutorial walks you […]

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Common Problems 120605

Debian 11 Journald Grows Too Large and Consumes Disk

🟡 Medium   ⏱ 5–30 min  Last verified: 21 May 2022 Affected versions: Debian 11 📖 ~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 118462

Ubuntu 16.04 Disk Space Suddenly Full Due to Journal Logs

🟡 Medium   ⏱ 5–30 min  Last verified: 21 May 2022 📖 ~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 117080

Ubuntu 22.04 LTS Node Exporter Missing Metrics After Service User Hardening

🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2022 📖 ~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 120658

Debian 11 – LVM thin pool reaches 100% and blocks writes

🔴 Critical   ⏱ 5–30 min  Last verified: 18 May 2022 Affected versions: Debian 11 📖 ~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 116967

Ubuntu 22.04 journalctl Logs Consume Excessive Disk Space

🟡 Medium   ⏱ 5–30 min  Last verified: 17 May 2022 📖 ~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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