Capacity Planning

Common Problems 116099

Ubuntu 26.04 LTS – LVM thin pool reaches 100% and new writes fail

🟠 High   ⏱ 5–30 min  Last verified: 5 August 2026 Affected versions: Ubuntu 26.04 LTS Ubuntu 26.04 Ubuntu 26.04.1 📖 ~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 […]

Read more
Common Problems 114002

LVM extension fails with no free extents

🟠 High   ⏱ 5–30 min  Last verified: 31 July 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~1 min read Table of contents Problem Summary Symptoms Diagnostics Root Cause Primary Fix Verification Prevention Rollback Automation Command Reference Escalation Related Notes Problem Summary lvextend cannot grow filesystem due to exhausted volume group space. Symptoms Error […]

Read more
Common Problems 116042

Ubuntu 26.04 LTS – root filesystem fills due to systemd journal growth – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 28 July 2026 Affected versions: Ubuntu 26.04 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 […]

Read more
How to Analyze Network Traffic with Wireshark CLI (tshark) on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Analyze Network Traffic with Wireshark CLI (tshark) on RHEL 10

Introduction This tutorial demonstrates how to Analyze Network Traffic with Wireshark CLI (tshark) on RHEL 10 on RHEL 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered RHEL 10 system with the […]

Read more
How to Install and Configure Varnish Cache on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install and Configure Varnish Cache on RHEL 10

Introduction This tutorial demonstrates how to Install and Configure Varnish Cache on RHEL 10 on RHEL 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered RHEL 10 system with the default AppStream […]

Read more
How to Set Up a PXE Boot Server on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Set Up a PXE Boot Server on Oracle Linux 10

Introduction This tutorial demonstrates how to Set Up a PXE Boot Server on Oracle Linux 10 on Oracle Linux 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 10 system […]

Read more
How to Install Lua on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install Lua on RHEL 10

Introduction This tutorial demonstrates how to Install Lua on RHEL 10 on RHEL 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered RHEL 10 system with the default AppStream repositories enabled. Prerequisites […]

Read more
Common Problems 122612

Filesystem Full on /var Causes Service Outages

🔴 Critical   ⏱ 5–30 min  Last verified: 21 July 2026 Affected versions: FreeBSD 14 📖 ~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 & […]

Read more
How to Register a GitHub Actions Self-Hosted Runner on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Register a GitHub Actions Self-Hosted Runner on Oracle Linux 10

Introduction This tutorial demonstrates how to Register a GitHub Actions Self-Hosted Runner on Oracle Linux 10 on Oracle Linux 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 10 system […]

Read more
Common Problems 116040

Ubuntu 26.04 LTS /boot Partition Full Prevents Kernel Updates

🟠 High   ⏱ 5–30 min  Last verified: 19 July 2026 Affected versions: Ubuntu 26.04 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 […]

Read more
CHAT