DNS

Common Problems 116913

Ubuntu 22.04 LTS – boot drops to initramfs after unclean shutdown – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 21 August 2022 Affected versions: Ubuntu 22.04 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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Common Problems 120708

Debian 11 Boot Delay Caused by Failed fstab Mount

🟠 High   ⏱ 5–30 min  Last verified: 20 August 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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How to Use Terraform to Provision Infrastructure on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Use Terraform to Provision Infrastructure on RHEL 9

Terraform’s power lies in its ability to provision real cloud infrastructure — virtual machines, networks, databases, DNS records, load balancers, and Kubernetes clusters — using declarative configuration. A Terraform configuration describes the desired end state, and Terraform calculates and executes the actions needed to reach that state. Key concepts in practice are: resources (infrastructure objects […]

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How to Configure Btrfs File System on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Configure Btrfs File System on Debian 11

Introduction Debian 11 Bullseye is built around the ethos of stability and free software. Setting up configure btrfs file system on debian 11 on Bullseye leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bullseye freeze. Follow each step carefully and […]

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How To Configure BIND as a Private Network DNS Server on Ubuntu 22.04 — step-by-step Linux tutorial on Progressive Robot

How To Configure BIND as a Private Network DNS Server on Ubuntu 22.04

In this tutorial, you will set up an internal DNS server using two Ubuntu 22.04 servers. You will use the BIND name server software (BIND9) to resolve private hostnames and private IP addresses. This provides a central way to manage your internal hostnames and private IP addresses, which is indispensable when your environment expands to more than a few hosts.

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Common Problems 120460

Debian 11: APT GPG signature verification failures

🟠 High   ⏱ 5–30 min  Last verified: 19 August 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 118085

Ubuntu 18.04 LTS – Java app fails with too many open files

🟠 High   ⏱ 5–30 min  Last verified: 19 August 2022 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 116939

Ubuntu 22.04 LTS – netplan apply fails with YAML indentation errors

🟠 High   ⏱ 5–30 min  Last verified: 19 August 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 rsync Backup Jobs on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Set Up rsync Backup Jobs on Debian 11

Introduction Debian 11 Bullseye is built around the ethos of stability and free software. Setting up set up rsync backup jobs on debian 11 on Bullseye leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bullseye freeze. Follow each step carefully […]

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How to Install Graylog for Centralised Log Management on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Graylog for Centralised Log Management on RHEL 7

How to Install Graylog for Centralised Log Management on RHEL 7 Centralised log management is essential for any production environment. When servers, applications, and network devices each write logs independently, troubleshooting incidents becomes painfully slow. Graylog solves this by aggregating logs from every source into a single, searchable platform. Built on top of MongoDB and […]

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